#include <cstdio>
char filenameA[100];
char filenameB[100];
FILE* fileAp = NULL;
FILE* fileBp = NULL;
int main()
{
scanf("%s%s",filenameA,filenameB);
fileAp = fopen(filenameA,"r");
fileBp = fopen(filenameB,"r");
if(fileAp==NULL)
{
printf("can not find file named %s.\n",filenameA);
return 0;
}
if(fileBp==NULL)
{
printf("can not find file named %s.\n",filenameB);
return 0;
}
return 0;
}