If you're referring to the second sample test, the input is sc301s, the expected return value is c0s3s1, your current code returns s1cs30

strng='c0s3s1'
array=[4,0,3,1,5,2]

"c"=4
"0"=0
"s"=3
"3"=1
"s"=5
"1"=2
result=031scs

x should equal y means that your code returned x, but the test expected your code to return y. You might be reading that backwards.

score_hand(['A','A']) expected 20 not 12

expect(caffeineBuzz(4)).to.equal("mocha_missing!")?
4%4=0 then expect Coffee