#include 
#include 
using namespace std;

int main()
{
    int minuti;
    int saati;
    int minuti1;
    int saati1;
    cin>>saati>>minuti>>saati1>>minuti1;

    queueq;

    int niza[]{-1,1,0,0};
    int niza1[]{0,0,-1,1};

    bool visited[24][60];

  for(int m=0; m<24; m++){
    for(int n=0; n<60; n++){
        visited[m][n]=false;
    }
  }

    q.push(saati);
    q.push(minuti);
    q.push(0);

    while(!q.empty()){
    int cs=q.front();
    q.pop();
    int cm=q.front();
    q.pop();
    int pritisoci=q.front();
    q.pop();

    if((cs==saati1)and(cm==minuti1)){
    cout<