#include<bits/stdc++.h>
using namespace std;
int n,q;
string ss;
int main()
{
    cin>>n>>q;
    cin>>ss;
    while(q--)
    {
        int l,r;
        cin>>l>>r;
        for(int i=l;i<=r;i+=2)
        {
            ss=ss.insert(i-1,1,ss[i-1]);
            r++;
        }
    }
    cout<<ss<<endl;
    return 0;
}