Uncaught TypeError: Cannot read properties of undefined (reading 'add') - Wont add

Question

Can anyone help me, I have been working on a project and cannot for the life of me work out why some of these work, and the lines such as 'queens' doesnt add or remove the classes...

I am attempting to make it so it verifies each line, checks if the current card is (for example) the ace of hearts, 'aceh', if so it add the current class, after this it then removes it once it is added to the prevcard var.

At the same time of adding it to the prevcard var, it adds another random card, lets say 'kingc' to the current card var... However it doesn't add the class to some of the vars and doesn't remove from others.

//CARD VERIFYING
if (currentcard == 'aceh'){aceh.classList.add('current')};
if (prevcard == 'aceh'){aceh.classList.add('prev')};
if (currentcard == 'aced'){aced.classList.add('current')};
if (prevcard == 'aced'){aced.classList.add('prev')};
if (currentcard == 'acec'){acec.classList.add('current')};
if (prevcard == 'acec'){acec.classList.add('prev')};
if (currentcard == 'aces'){aces.classList.add('current')};
if (prevcard == 'aces'){aces.classList.add('prev')};

if (currentcard == 'twoh'){twoh.classList.add('current')};
if (prevcard == 'twoh'){twoh.classList.add('prev')};
if (currentcard == 'twod'){twod.classList.add('current')};
if (prevcard == 'twod'){twod.classList.add('prev')};
if (currentcard == 'twoc'){twoc.classList.add('current')};
if (prevcard == 'twoc'){twoc.classList.add('prev')};
if (currentcard == 'twos'){twos.classList.add('current')};
if (prevcard == 'twos'){twos.classList.add('prev')};

if (currentcard == 'threeh'){threeh.classList.add('current')};
if (prevcard == 'threeh'){threeh.classList.add('prev')};
if (currentcard == 'threed'){threed.classList.add('current')};
if (prevcard == 'threed'){threed.classList.add('prev')};
if (currentcard == 'threec'){threec.classList.add('current')};
if (prevcard == 'threec'){threec.classList.add('prev')};
if (currentcard == 'threes'){threes.classList.add('current')};
if (prevcard == 'threes'){threes.classList.add('prev')};

if (currentcard == 'fourh'){fourh.classList.add('current')};
if (prevcard == 'fourh'){fourh.classList.add('prev')};
if (currentcard == 'fourd'){four.classList.add('current')};
if (prevcard == 'fourd'){four.classList.add('prev')};
if (currentcard == 'fourc'){four.classList.add('current')};
if (prevcard == 'fourc'){four.classList.add('prev')};
if (currentcard == 'fours'){four.classList.add('current')};
if (prevcard == 'fours'){fours.classList.add('prev')};

if (currentcard == 'fiveh'){fiveh.classList.add('current')};
if (prevcard == 'fiveh'){fiveh.classList.add('prev')};
if (currentcard == 'fived'){fived.classList.add('current')};
if (prevcard == 'fived'){fived.classList.add('prev')};
if (currentcard == 'fivec'){fivec.classList.add('current')};
if (prevcard == 'fivec'){fivec.classList.add('prev')};
if (currentcard == 'fives'){fives.classList.add('current')};
if (prevcard == 'fives'){fives.classList.add('prev')};

if (currentcard == 'sixh'){sixh.classList.add('current')};
if (prevcard == 'sixh'){sixh.classList.add('prev')};
if (currentcard == 'sixd'){sixd.classList.add('current')};
if (prevcard == 'sixd'){sixd.classList.add('prev')};
if (currentcard == 'sixc'){sixc.classList.add('current')};
if (prevcard == 'sixc'){sixc.classList.add('prev')};
if (currentcard == 'sixs'){sixs.classList.add('current')};
if (prevcard == 'sixs'){sixs.classList.add('prev')};

if (currentcard == 'sevenh'){sevenh.classList.add('current')};
if (prevcard == 'sevenh'){sevenh.classList.add('prev')};
if (currentcard == 'sevend'){sevend.classList.add('current')};
if (prevcard == 'sevend'){sevend.classList.add('prev')};
if (currentcard == 'sevenc'){sevenc.classList.add('current')};
if (prevcard == 'sevenc'){sevenc.classList.add('prev')};
if (currentcard == 'sevens'){sevens.classList.add('current')};
if (prevcard == 'sevens'){sevens.classList.add('prev')};

if (currentcard == 'eighth'){eighth.classList.add('current')};
if (prevcard == 'eighth'){eighth.classList.add('prev')};
if (currentcard == 'eightd'){eightd.classList.add('current')};
if (prevcard == 'eightd'){eightd.classList.add('prev')};
if (currentcard == 'eightc'){eightc.classList.add('current')};
if (prevcard == 'eightc'){eightc.classList.add('prev')};
if (currentcard == 'eights'){eights.classList.add('current')};
if (prevcard == 'eights'){eights.classList.add('prev')};

if (currentcard == 'nineh'){nineh.classList.add('current')};
if (prevcard == 'nineh'){nineh.classList.add('prev')};
if (currentcard == 'nined'){nined.classList.add('current')};
if (prevcard == 'nined'){nined.classList.add('prev')};
if (currentcard == 'ninec'){ninec.classList.add('current')};
if (prevcard == 'ninec'){ninec.classList.add('prev')};
if (currentcard == 'nines'){nines.classList.add('current')};
if (prevcard == 'nines'){nines.classList.add('prev')};

if (currentcard == 'tenh'){tenh.classList.add('current')};
if (prevcard == 'tenh'){tenh.classList.add('prev')};
if (currentcard == 'tend'){tend.classList.add('current')};
if (prevcard == 'tend'){tend.classList.add('prev')};
if (currentcard == 'tenc'){tenc.classList.add('current')};
if (prevcard == 'tenc'){tenc.classList.add('prev')};
if (currentcard == 'tens'){tens.classList.add('current')};
if (prevcard == 'tens'){tens.classList.add('prev')};

if (currentcard == 'jackh'){jackh.classList.add('current')};
if (prevcard == 'jackh'){jackh.classList.add('prev')};
if (currentcard == 'jackd'){jackd.classList.add('current')};
if (prevcard == 'jackd'){jackd.classList.add('prev')};
if (currentcard == 'jackc'){jackc.classList.add('current')};
if (prevcard == 'jackc'){jackc.classList.add('prev')};
if (currentcard == 'jacks'){jacks.classList.add('current')};
if (prevcard == 'jacks'){jacks.classList.add('prev')};

if (currentcard == 'queenh'){queenh.classList.add('current')};
if (prevcard == 'queenh'){queenh.classList.add('prev')};
if (currentcard == 'queend'){queend.classList.add('current')};
if (prevcard == 'queend'){queend.classList.add('prev')};
if (currentcard == 'queenc'){queenc.classList.add('current')};
if (prevcard == 'queenc'){queenc.classList.add('prev')};
if (currentcard == 'queens'){queens.classList.add('current')};
if (prevcard == 'queens'){queens.classList.add('prev')};

if (currentcard == 'kingh'){kingh.classList.add('current')};
if (prevcard == 'kingh'){kingh.classList.add('prev')};
if (currentcard == 'kingd'){kingd.classList.add('current')};
if (prevcard == 'kingd'){kingd.classList.add('prev')};
if (currentcard == 'kingc'){kingc.classList.add('current')};
if (prevcard == 'kingc'){kingc.classList.add('prev')};
if (currentcard == 'kings'){kings.classList.add('current')};
if (prevcard == 'kings'){kings.classList.add('prev')};