#include <iostream>
#include <string>

int main(){
	int n[4]={0,0,0,0},i;
	std::string s;

	while (std::cin>>s){
		s = s.substr(s.find(",")+1);
		n[(s=="A")?0:(s=="B")?1:(s=="O")?3:2]++;
	}
	for (i=0; i<4; i++) std::cout<<n[i]<<std::endl;
}