#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <limits.h>
#include <stdbool.h>

int howManyGames(int p, int d, int m, int s) {
    // Return the number of games you can buy
    int i,j,count=0,total=0,cost;
    cost=p;
    printf("%d ",cost);
    total+=cost;
    printf("%d\n", total);
    count++;
    while(total<=s)
    {
		if(((cost-d)<m) && (total>(total+m)))
		{
			cost=m;
			printf("%d ",cost);
            total+=cost;
            printf("%d\n", total);
            count++;
		}
        if(cost>m)
        {
			cost=cost-d;
			printf("%d ",cost);
            total+=cost;
            printf("%d\n", total);
            count++;
        }
        else if(cost<m)
        {
            cost=m;
            printf("%d ",cost);
            total+=cost;
            printf("%d\n", total);
            count++;
        }
    }
    return count;
}

int main() {
    int p; 
    int d; 
    int m; 
    int s; 
    scanf("%i %i %i %i", &p, &d, &m, &s);
    int answer = howManyGames(p, d, m, s);
    printf("%d\n", answer);
    return 0;
}