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

void main(void){
	int n = 0 ;
	scanf("%d",&n);
	char sleep[100000]  = "a"	;
	scanf("%s",sleep);
	int count = 0;
	for(int i = 1; i < n ; i++){
		if(sleep[i-1] == 'x' && sleep[i] == 'o'){
			printf("%d ",i+1);
			count++;
		}
	}
	if(count == 0){
		printf("0");
	}
}