#include <cstdio>
#include <cstring>
#include <algorithm>
#include <vector>
#define INF 2000000000
#define MaxN 205
using namespace std;
    


FILE *IN,*OUT;
int N,L,T,OX;
struct _Din
{
    int f,pos,val;
}D[MaxN][MaxN];
struct _Drink
{
    int A,B;
}v[MaxN],O[MaxN];
bool GetMax(int val)
{
    int X;
    memset(D,0,sizeof D);
    D[0][0].pos=1;
    for(int i=1;i<=N;i++)
		for(int j=0;j<=val/v[i].A;j++)
		{
			X=(val-j*v[i].A)/v[i].B;
			for(int k=0;k<=L-j;k++)
				if(D[i-1][k].pos)
				{
					D[i][k+j].pos=1;
					if(D[i][k+j].val<=D[i-1][k].val+X)
						D[i][k+j].val=D[i-1][k].val+X,D[i][k+j].f=k;
				}
	    }
	return D[N][L].val>=L;
}
int main()
{
    IN=fopen("lapte.in","r");
    OUT=fopen("lapte.out","w");
 
    fscanf(IN,"%d%d",&N,&L);
    for(int i=1;i<=N;i++)
        fscanf(IN,"%d%d",&v[i].A,&v[i].B);
    int hi=100,lw=1,mid;
    while(hi>=lw)
    {
        mid=(hi+lw)>>1;
        if(GetMax(mid))
            T=mid,hi=mid-1;
        else lw=mid+1;
    }
    fprintf(OUT,"%d\n",T);
	GetMax(T);
	for(int i=N;i>0;i--)
	{
		O[i].B=D[i][L].val-D[i-1][D[i][L].f].val;
		O[i].A=L-D[i][L].f;
		L=D[i][L].f;
	}
	for(int i=1;i<=N;i++)
		fprintf(OUT,"%d %d\n",O[i].A,O[i].B);
    return 0;
}