Help me in solving PYTH22 problem

My issue

if in this question it said that assign value 23 to a and assign value 20 to b but why in the code we assign a = 20 instead of 23 and b in same 23 instead of 20 and then sum it.

My code

# Update the code below this line to solve the problem
a = 20
b = 23
sum = a+b

Learning course: Learn Python
Problem Link: CodeChef: Practical coding for everyone

Both are same because we’re adding it