#include<stdio.h>
#include<string.h>

#define STR_MAX 1000

void strcng(char *str,const char *search,const char *insert)
{
 char *p;
 char temp[STR_MAX];
 while((p=strstr(str,search))!=NULL)
 {
  p='\0';
  p+=strlen(search);
  strcpy(temp,p);
  strcat(str,insert);
  strcat(str,temp);
 }
}

int main()
{
 
 return 0;
}