#include <fstream>
using namespace std;

ifstream cin("lapte.in");
ofstream cout("lapte.out");

int n, l, i, j, k;
int a[101], b[101];
int d[101][101], last[101][101];

bool sol(int t)
{
	memset(d, -1, sizeof(d));
	int i, j, k, val;
	d[0][0] = 0;

	for(i=1;i<=n;++i)
		for(j=0;j<=l;++j)
			if(d[i-1][j] != -1)
			for(k=min(l-j, t / a[i]);k>=0;--k)
			{
				val = (t - k * a[i]) / b[i] + d[i-1][j];
				if (val > d[i][j+k])
					d[i][j+k] = val,
					last[i][j+k] = j;
			}
	return d[n][l] >= l;		
}

void print(int i, int j)
{
	if(i==0)
		return;
	int val = d[i][j] - d[i-1][last[i][j]];
	print(i - 1, last[i][j]);
	cout << j - last[i][j] << " " << val << "\n";
}

int main()
{

	cin >> n >> l;
	for(int i=1;i<=n;++i)
		cin >> a[i] >> b[i];

	int st = 0, dr = 100, mij;
	while(st < dr)
	{
		mij = (st + dr) >> 1;
		if(sol(mij))
			dr = mij;
		else
			st = mij + 1;
	}

	sol(st);
	cout << st << endl;
	print(n, l);

	return 0;
}