using namespace std;
#include <bits/stdc++.h>
#define rep(i,n) for(auto i=0; i<(n); i++)
#define mem(x,val) memset((x),(val),sizeof(x));
#define rite(x) freopen(x,"w",stdout);
#define read(x) freopen(x,"r",stdin);
#define all(x) x.begin(),x.end()
#define sz(x) ((int)x.size())
#define sqr(x) ((x)*(x))
#define pb push_back
#define clr clear()
#define inf (1<<30)
#define ins insert
#define xx first
#define yy second
#define eps 1e-9
typedef long long i64;
typedef unsigned long long ui64;
typedef string st;
typedef vector<int> vi;
typedef vector<st> vs;
typedef map<int,int> mii;
typedef map<st,int> msi;
typedef set<int> si;
typedef set<st> ss;
typedef pair<int,int> pii;
typedef vector<pii> vpii;
#define mx 0
vector<char> txt;
void reverse_vec(int a, int b){
int first = a;
int last = b;
while((first != last) && (first !=--last)){
swap(txt[first],txt[last]);
++first;
}
}
int main() {
ios_base::sync_with_stdio(0);
int n, m;
cin >> n >> m;
st input;
cin >> input;
txt.reserve(n);
for(int i = 0; i < n; i++){
txt.push_back(input[i]);
}
for(int i = 0; i < m; i++){
int begin, end;
cin >> begin >> end;
reverse_vec(begin - 1, end);
}
for (auto it: txt){ cout << it; }
cout << "\n";
return 0;
}
