Mock CCC '18 Contest 3 J3/S1 - A String Problem

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Points: 5 (partial)
Time limit: 1.0s
Memory limit: 1G

Problem type

Given a string, determine the minimum number of characters that need to be deleted such that there are only one or two distinct letters remaining.

Constraints

1 \le N \le 100

The string only consists of lowercase letters.

Input Specification

The input consists of a single string of length N.

Output Specification

Print, on a single line, the minimum number of characters to be deleted.

Sample Input 1

abc

Sample Output 1

1

Sample Input 2

aab

Sample Output 2

0

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