#include <iostream>
#include <unistd.h>
#include <sys/types.h>
using namespace std;
int main()
{
cout<<"*\n";
fork();
cout<<"A\n";
fork();
cout<<"B\n";
fork();
cout<<"C\n";
return 0;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgojaW5jbHVkZSA8dW5pc3RkLmg+CiNpbmNsdWRlICA8c3lzL3R5cGVzLmg+CgoKdXNpbmcgbmFtZXNwYWNlIHN0ZDsKCmludCBtYWluKCkKewogICAgY291dDw8IipcbiI7CiAgICBmb3JrKCk7CiAgICBjb3V0PDwiQVxuIjsKICAgIGZvcmsoKTsKICAgIGNvdXQ8PCJCXG4iOwogICAgZm9yaygpOwogICAgY291dDw8IkNcbiI7CiAgICByZXR1cm4gMDsKfQ==