#include <iostream>
#include <vector>
using namespace std;
int main()
{
int i=0;
int m=0;
int count=0;
vector <int> a;
vector <int> b;
while(cin>>m)
{
if(count==0)
{
a.push_back(m);
}
else
{
b.push_back(m);
}
if(getchar()=='\n')
{
count=1;
}
}
int len1=a.size();
int len2=b.size();
int x=0;
int y=0;
for(i=0;i<len1+len2;i++)
{
if(x<len1 && y<len2)
{
if(a[x]<=b[y])
{
cout<<a[x];
x++;
}
else
{
cout<<b[y];
y++;
}
}
else
{
if(x>=len1)
{
cout<<b[y];
y++;
}
else
{
cout<<a[x];
x++;
}
}
if(i!=len1+len2-1)
{
cout<<" ";
}
}
return 0;
}



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