onefishtwofishredfishbluefish
one fish two fish red fish?blue!fish : YES
she won't fish for fish! : YES
z one fish two fish : NO

a
a a a : NO

gjhgjgjgjgj
. . // ggjj : YES
87987 jj 2343 : YES

abcdefghijklmnopqrstuvwxyz
abc : YES
ABC : YES

these are in caps
ThEsE ArE iN cApS! : YES
tthheesse ARE iinn CCaaPPss... : NO