When i checked the input str itself is wrong , function is feeded with wrong input data for sample test case instead of feeding "Dermatoglyphics" it is feeded "Dermatoglyphicsisogram" So it is failed
I just printed the logs of string what kind of input is feeding into this static function, see below message . So any thought How to proceed further , i am a newbie.

print chracter D
print chracter e
print chracter r
print chracter m
print chracter a
print chracter t
print chracter o
print chracter g
print chracter l
print chracter y
print chracter p
print chracter h
print chracter i
print chracter c
print chracter s
print chracter i
print chracter s
print chracter o
print chracter g
print chracter r
print chracter a
print chracter m