#include <string>
#include <string.h>
#include <iostream>
 
using namespace std;
 
int main()
{
    int N, B[4]; string S;
 
    memset(B, 0, sizeof(B));
 
    while (cin >> N >> S)
    {
        if (S == ",A")
        {
            B[0] += 1;
        }
        else if (S == ",B")
        {
            B[1] += 1;
        }
        else if (S == ",AB")
        {
            B[2] += 1;
        }
        else if (S == ",O")
        {
            B[3] += 1;
        }
    }
 
    cout << B[0] << endl << B[1] << endl << B[2] << endl << B[3] << endl;
 
    return 0;
}
