#include<stdio.h>
int main()
{
	char a[24],b[24],c[100];
	char * p,* q;
	int i=0,j;
	scanf("%s%s",a,b);
	p=a;
	q=b;
	while(p[i]==q[i]&&p[i]!='\0'&&q[i]!='\0')
		i=i+1;
	if(p[i]=='\0'&&q[i] == '\0')
	{
		for(i=0;p[i]!='\0';i++)
		c[i]=p[i];
	}
	else
	{
		for(i=0;p[i]!='\0';i++)
		{
			c[i]=p[i];
		}
		for(j=0;q[j]!='\0';j++)
		{
			c[i+j]=q[j];
		}
	}
	
	printf("%s",c);
	return 0;
}