Unique Alphabet Count

A string S is passed as input to the program which has only alphabets (all alphabets in lower case). The program must print the unique count of alphabets in the string.

Input Format:
– The first line will contain value of string S+

Boundary Conditions:
1 <= Length of S <= 100

Output Format:
The integer value representing the unique count of alphabets in the string S.

Example Input/Output 1:
Input:
level

Output:
3

Explanation:
The unique alphabets are l,e,v. Hence 3 is the output.

Example Input/Output 2:
Input:
manager

Output:
6

print(len(set(input().strip())))