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#include <bits/stdc++.h>
using namespace std;
ifstream fin("rucsac.in");
ofstream fout("rucsac.out");
struct dp{
int g,p;
};
dp a[5005];
int n,G;
void Citire()
{
fin>>n>>G;
for(int i=1;i<=n;i++)
fin>>a[i].g>>a[i].p;
}
void Sort()
{
for(int i=1;i<n;i++)
for(int j=i+1;j<=n;j++)
if(a[i].g>a[j].g)
swap(a[i],a[j]);
}
void Rez()
{
int i=1;
int greut=a[1].g;
int sum=a[1].p;
for(int i=1;i<=n;i++)
fout<<a[i].g<<" "<<a[i].p<<"\n";
while(greut+a[i].g<=G)
{
greut+=a[i].g;
sum+=a[i].p;
i++;
}
fout<<sum<<"\n";
}
int main()
{
Citire();
Sort();
Rez();
return 0;
}