enter = 'abcdefghijklmnopqrstuvwxyzabcdefghijklmnnmlkjihgfedcbazyxwvutsrqponmlkjihgfedcba'

word = []
for char in enter:
    word.append(char)

word.reverse()

backword = ''
for char in word:
    backword = backword + char

if enter == backword:
    print 'Yes'
else: print 'No'