#include <bits/stdc++.h>
#include <stdio.h>

using namespace std;

#define DEB(x) cout << #x << " = " << x << endl;

int main(void) {
    int n;
    char c;
    while (scanf("%d %c", &n, &c) == 2) {

        if (c == 'R') {
            printf("%d\n", n);
            continue;
        } else if (c == 'B') {
            printf("%d\n", n);
            continue;
        } else if (c == 'K') {
            int r;
            if (n == 1) r = 1;
            else r = 4;
            printf("%d\n", r);
            continue;
        } else if (c == 'N') {
            int r;
            if (n < 3) r = 1;
            else r = 2;
            printf("%d\n", r);
            continue;
        }
    }

    return 0;
}