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

int n,s;
pair<int,int> a[101];
int m[101];

int main() {
   cin >> n >> s;
   for(int i = 0 ; i < n ; i++) {
      cin >> a[i].F >> a[i].S;
      m[i] = a[i].F * 60 + a[i].S;
   }
   if(m[0] > s) {
      cout << "0 0";
      return 0;
   }
   for(int i = 0 ; i < n-1 ; i++) {
      if(m[i+1] - m[i] - 3 >= 2*s ) {
         int x = m[i] + s;
         if(x % 60 + 1 == 60)
            cout << x / 60 + 1 << " 0";
         else
            cout << x / 60 << " " << x % 60+1;
         return 0;
      }
   }
   int x = m[n-1] + s;
   if(x % 60 + 1 == 60)
        cout << x / 60 + 1 << " 0";
   else
        cout << x / 60 << " " << x % 60 + 1;
}