#include<stdio.h>
#include<string.h>
main()
{char a[20],b[10];
int m,n,i,j;
printf("input 2 strings the length less than 10:\n");
gets(a);
gets(b);
m=strlen(a);
n=strlen(b);
for(i=m,j=0;j<=n+1;i++,j++)
a[i]=b[j];
printf("the result is:\n");
puts(a);
}
