#include <iostream>

using namespace std;

int cnt , i ;
char s[10] ;

int main()
{
    cnt = 73 ;

    cin >> s ;

    for ( i = 3 ; i <= 8 ; i ++ )
    {
        if ( s[i-1] == s[i] )
        {
            cnt -- ;
        }
    }

    cout << cnt ;

    return 0;
}