#include <fstream>
#define INF 1000000000
 
using namespace std;
 
ifstream f("lapte.in");
ofstream g("lapte.out");
 
int n,l,i,j,k,t;
 
int cost[150][150],d[150][150],a[150],b[150];
 
void write_sol(int x, int y, int z);
 
int main() {
    f>>n>>l;
    for(i=1;i<=n;i++)
        f>>a[i]>>b[i];
    for(t=1;t<=100;t++) {
        for(i=0;i<=n;i++)
            for(j=0;j<=l;j++)
                d[i][j]=-INF;
        d[0][0]=0;
        for(i=1;i<=n;i++)
            for(j=0;j<=l;j++)
                for(k=0;k*a[i]<=t;k++)
                    if(d[i][j]<d[i-1][j-k]+(t-k*a[i])/b[i]) {
                        cost[i][j]=k;
                        d[i][j]=d[i-1][j-k]+(t-k*a[i])/b[i];
                    }
        if(d[n][l]>=l) {
            g<<t<<"\n";
            write_sol(n,l,t);
            break;
        }
    }
    return 0;
}
 
void write_sol(int x, int y, int z) {
    if(x!=0) {
       write_sol(x-1,y-cost[x][y],y);
       g<<cost[x][y]<<" "<<(t-cost[x][y]*a[x])/b[x]<<"\n";
    }
}