大佬看看我的代码

#include<bits/stdc++.h> 
using namespace std;

int main(){
	string a;//"abc" a[1]='b'
	int boy=0, girl=0; 
	cin>>a;
	for(int i=0;i<a.size();i++){
		if(a[i]=='b' and a[i+1]=='o' and a[i+2]=='y')
			boy++;
		if(a[i]=='g' and a[i+1]=='i' and a[i+2]=='r' and a[i+3]=='l')
			girl++;
	}
	cout << boy << '\n' << girl;
	return 0;
}

我哪里错了??