#include <stdio.h>
int main(){
    //input
    char S[9+1];
    scanf("%s",S);

    //char total of "yukicoder"
    int t1 = 'y'+'u'+'k'+'i'+'c'+'o'+'d'+'e'+'r';

    //char total of S
    int t2 = 0;
    for (int i = 0;i < 9;i++){
        if (S[i] != '?'){
            t2 += S[i];
        }
    }

    //output
    printf("%c\n",t1-t2);
    return 0;
}