## Can anyone help me find out why is there a NZEC error in this simple code? All codes I’m writing in python are having error.

```
k=0
t = input("")
def rever(a):
add = 0
while a!=0 :
c = a%10
add = add*10 + c
a = a/10
return add
while k<t :
x = input("")
y = input("")
val = rever(x) + rever(y)
k = k+1
```