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



void lower(char * s){
  int len = strlen(s);

  for (int i = 0; i < len; i++){
    if (s[i] >= 'A' && s[i] <= 'Z')
      s[i]  -= ('A' - 'a');
    
  }
}
  
  
  
  
  
int main(int argc, char * argv[]){
  int count = atoi(argv[1]);
  char * str = (char *) calloc(count, sizeof(char));

  for (int i = 0; i < count-1; i++){
    str[i] = 'A';
  }
	
	str[count-1] = '\0';


  lower(str);
  fprintf(stdout,"done \n");

  return 0;

}