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#include<stdio.h>
main()
{
 char x[10],y[10],z[20],*p,*p1;
 int i=0,j=0,k;
  p=x;
  p1=y;
  scanf("%s",x);
  scanf("%s",y);
  while(x[i]!='\0')
  i++;
  while(y[j]!='\0')
j++;
for(i=0;i<j;i++)
   {
     if(x[i]==y[i])
       continue;
    else
break;
    }
 if(i==j)
    printf("%s",x);
  else
   {
 k=0;  
 i=0;
  while(x[k]!='\0')
    {
       *p=x[k];
      p++;
      k++;
    }
  while(y[i]!='\0')  
  {
    *p=y[k];
    p++;
    i++;
  }
 *p='\0';
printf("%s\n",x);
 }
}