# include <fstream>
# include <iostream>
# define DIM 128
using namespace std;
int n, l, a[DIM], b[DIM], bst[DIM][DIM], sol=DIM, d[DIM][DIM], s[DIM][2];

void read ()
{
	ifstream fin ("lapte.in");
	fin>>n>>l;
	for(int i=1;i<=n;++i)
		fin>>a[i]>>b[i];
}

int ok (int t)
{
	for(int i=0;i<=n;++i)
		for(int j=0;j<=l;++j)
			bst[i][j]=-1;
	bst[0][0]=0;
	for(int i=1;i<=n;++i)
		for(int j=0;j<=l;++j)
			for(int k=0;k<=l;++k)
			{
				if (k>j)continue;
				if (bst[i-1][j-k]<0)continue;
				if (k*a[i]>t)continue;
				if (bst[i][j]<bst[i-1][j-k]+(t-k*a[i])/b[i])
				{
					bst[i][j]=bst[i-1][j-k]+(t-k*a[i])/b[i];
					d[i][j]=k;
				}
			}
	if (bst[n][l]>=l)
	{
		for(int i=n, j=l;i;--i)
		{
			s[i][0]=d[i][j];
			s[i][1]=bst[i][j]-bst[i-1][j-d[i][j]];
			j=j-d[i][j];
		}
		return 1;
	}
	return 0;
}	

void cauta (int st, int dr)
{
	if (st==dr)
	{
		if (st<sol && ok(st))
			sol=st;
		return;
	}
	int mij=(st+dr)/2;
	if (ok(mij))
	{
		sol=mij;
		cauta (st,mij);
	}
	else
		cauta (mij+1, dr);
}

void write ()
{
	ofstream fout ("lapte.out");
	fout<<sol<<endl;
	for(int i=1;i<=n;++i)
		fout<<s[i][0]<<" "<<s[i][1]<<endl;
}

int main()
{
	read ();
	cauta(1, 100);
	write ();
	return 0;
}