#include<stdio.h>
#include<string.h>
char c[41];
void mystrcat(char a[],char b[])
{
	int i,j=0,k;
	for(i=0;i<strlen(a);i++)
		c[i]=a[i];
	k=i;
	for(;i<(k+strlen(b));i++)
		c[i]=b[j++];
	c[i]='\0';	
}
int main()
{
	char a[21],b[21];
	while(scanf("%s",a)!=EOF)
	{
		scanf("%s",b);
	    mystrcat(a,b);
	    puts(c);
	}
	return 0;
}
/**************************************************************
	Problem: 2207
	User: admin
	Language: C
	Result: Accepted
	Time:12 ms
	Memory:1144 kb
****************************************************************/