s=str(raw_input())

if('a'<s>'z') or ('A'<s>'Z'):

	print('it is an alphabet')

else:

	print('it is not an alphabet')
3610afa2393c7e2e4362b900a6f6be3f43cd399a
<mask token>

<mask token>
if 'a' < s > 'z' or 'A' < s > 'Z':
    print('it is an alphabet')
else:
    print('it is not an alphabet')

s = str(raw_input())
if 'a' < s > 'z' or 'A' < s > 'Z':
    print('it is an alphabet')
else:
    print('it is not an alphabet')

s=str(raw_input())

if('a'<s>'z') or ('A'<s>'Z'):

	print('it is an alphabet')

else:

	print('it is not an alphabet')