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

int main() {
    ll n,q;
    cin>>n>>q;
    string s;
    cin>>s;
    while(q--){
        ll l,r;
        cin>>l>>r;
        ll j=l;
        for(ll i=l;i<=r;i++){
            s.insert(j,1,s[j-1]);
            j+=2;
        }
     
    }
    cout<<s<<endl;
    return 0;
}