MANYCHEF please suggest a test case where my code will fail. Its not failing & yet WA

general
1

i have tried the following test cases:-

???CIELIS???E? → CHEFCIELISACHEF

???CIELISOUR???F → CHEFCIELISOURCHEF

T?KEITE?SY → TAKEITEASY

??? → CHEFCHEF

??? → AAACHEF

C???F → CCHEF

& yet i am getting WA.
I have read the editorial,comments,googled it, yet no help…

can anyone come up with a test case where my code will fail ? Thanks…

Here is my code:-CodeChef: Practical coding for everyone

2

Try this:

1

C???

Your output: CHEFA

Expected output: CCHEF

3

Thanks. Got it.