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#include<stdio.h>
#include<stdlib.h>
void main()
{
char str[50],str1[50],*p,*p1;
int i=0,j=0,k;
scanf("%s",str);
scanf("%s",str1);
p=str;
p1=str1;
while(str[i]!='\0')
i++;
while(str1[j]!='\0')
j++;
for(i=0;i<j;i++)
{
if(str[i]==str1[i])
continue;
else
break;
}
if(i==j)
printf("%s",str);
else
{ k=0;
i=0;
while(str[k]!='\0')
{
*p=str[k];
p++;
k++;
}
while(str1[i]!=0)
{
*p=str1[i];
p++;
i++;
}
*p='\0';
printf("%s\n",str);
}
}