#include <bits/stdc++.h>
using namespace std;
#define io ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define ALL(x) x.begin(),x.end()
#define SZ(x) x.size()
#define PB push_back
#define MP make_pair
#define F first
#define S second
typedef long long LL;
typedef vector<int> VI;
typedef pair<int,int> PI;

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

int main() {
   io;
   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;
         cout << x / 60 << " " << x % 60+1;
         return 0;
      }
   }
   int x = m[n-1] + s;
   cout << x / 60 << " " << x % 60 + 1;
}