过了一回，再做一次，结果WA了

#include<bits/stdc++.h>
using namespace std;
bool lucky(string s){
	int sum=0,len=s.size();
	for(int i=len-1;i>=0;i--)
		if(i%2^len%2==1)sum+=(s[i]-'0')*7%9;
		else sum+=(s[i]-'0');
	return sum%8==0;
}
int main(){
	int n;
	cin>>n;
	while(n--){
		string s;
		cin>>s;
		if(lucky(s)) cout<<'T'<<endl;
		else cout<<'F'<<endl;
	}
	return 0;
}