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

#define SZ(a) (int)a.size()
#define ALL(a) a.begin(), a.end()
#define FOR(i, a, b) for (int i = (a); i<(b); ++i)
#define RFOR(i, b, a) for (int i = (b)-1; i>=(a); --i)
#define MP make_pair
#define PB push_back
#define F first
#define S second

typedef long long LL;
typedef pair<int, int> PII;
typedef vector<int> VI;

int main()
{
	ios::sync_with_stdio(false);
	cin.tie(0);
	
	map<char, int> m;
	m['A'] = 3;
	m['T'] = 2;
	m['G'] = 1;
	m['C'] = 0;
	string t = "CGTA";
	
	string s;
	cin >> s;
	
	int n = s.length();
	
	vector<VI> v(4, VI(n + 1));
	FOR(i, 0, n)
		v[m[s[i]]][i + 1] = 1;
	
	FOR(i, 0, 4)
		FOR(j, 0, n) v[i][j + 1] += v[i][j];
	
	int q;
	cin >> q;
	FOR(i, 0, q)
	{
		vector<PII> ans;
		int l, r;
		cin >> l >> r;
		FOR(j, 0, 4) ans.PB({v[j][r] - v[j][l - 1], j});
		sort(ALL(ans));
		reverse(ALL(ans));
		FOR(j, 0, 4) cout << t[ans[j].second];
		cout << '\n';
	}
	
	return 0;
}