CPP0110-MÃ SỐ QUỐC GIA

#include <bits/stdc++.h>
#define endl "\n"
using namespace std;
int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	int t;
	cin>>t;
	while(t--){
		string a;
		cin>>a;
		int n=a.size();
		for(int i=0;i<n;i++){
			if(i<=n-3&&a[i]=='0'&&a[i+1]=='8'&&a[i+2]=='4') i+=2;
			else cout<<a[i];
		}
		cout<<endl;
	}
}