#include <iostream>
#include <unistd.h>
#include <pthread.h>


void* T(char* cptr){
    sleep(1), write(1,cptr,1), *cptr = 'a';
}

int main() {
   char c = 's';
   int p = fork();
   if(p == 0){
       int tid; pthread_create(&tid, 0, T, &c);
       write(1,&c,1);
       c = 'p', pthread_join(tid,0);
       write(1, &c, 1);
   }else{
       p = fork();
       if(p ==0){
           write(1,&c,1);
       }else{
           write(1,&c,1);
       }
   }
   return 0;
}