#include <iostream>
using namespace std;
int ile(string s,char z){
	int ile=0;
	for(int i=0; i<s.size();i++)
	if(s[i]==z)
	ile++;
	return ile;
}
int main(){
	cout<<ile("CAATAAA",'A')<<endl;
	cout<<ile("CAATAAA",'C')<<endl;
	cout<<ile("CAATAAA",'T')<<endl;
	
	cout<<ile("TCTAAAGATATCGGG",'A')<<endl;
	cout<<ile("TCTAAAGATATCGGG",'C')<<endl;
	cout<<ile("TCTAAAGATATCGGG",'G')<<endl;
	cout<<ile("TCTAAAGATATCGGG",'T')<<endl;
	return 0;
}