输入错误。。。

#include<bits/stdc++.h>
using namespace std;
int main(){
  int t;
  cin>>t;
  string a,b,c,n;
  for(int i=0;i<t;i++){
    cin>>a[i]>>b[i]>>c[i]>>n[i];
  }
  for(int i=0;i<t;i++){
    if((a[i]+b[i]+c[i]+n[i])%3==0){
      int d=(a[i]+b[i]+c[i]+n[i])/3;
      if(((d-a[i])+(d-b[i])+(d-c[i]))==n[i]){
        cout<<"YES"<<endl;
        continue;
      }else{
        cout<<"NO"<<endl;
        continue;
      }
    }else{cout<<"NO"<<endl;
    continue;
    }
  }
  return 0;
}