Im almost finished with the vigenere problemset in cs50 but have one problem my brain cant find the solutions for, anyone have any ideas?

check50 2015.fall.pset2.vigenere vigenere.c:

:) vigenere.c exists

:) vigenere.c compiles

:) encrypts "a" as "a" using "a" as keyword

:( encrypts "world, say hello!" as "xoqmd, rby gflkp!" using "baz" as keyword \ expected output, but not "xoqmd, szz gflkp!\n"

:) encrypts "BaRFoo" as "CaQGon" using "BaZ" as keyword

:) encrypts "BARFOO" as "CAQGON" using "BAZ" as keyword

:) handles lack of argv[1]

:) handles argc > 2

I'm almost finished with the ´vigenereproblem set incs50` but have one problem my brain can't find the solutions for, anyone have any ideas?

check50 2015.fall.pset2.vigenere vigenere.c:
:) vigenere.c exists
:) vigenere.c compiles
:) encrypts "a" as "a" using "a" as keyword

**:( encrypts "world, say hello!" as "xoqmd, rby gflkp!" using "baz" as keyword
\ expected output, but not "xoqmd, szz gflkp!\n"**
:) encrypts "BaRFoo" as "CaQGon" using "BaZ" as keyword
:) encrypts "BARFOO" as "CAQGON" using "BAZ" as keyword
:) handles lack of argv[1]
:) handles argc > 2