package main

import "fmt"

func main() {
	var n int
	var s string
	fmt.Scan(&n,&s)
	m:=map[rune]int{}
	for _,c:=range s {
		m[c]++
	}
	for a:='A';a<='Z';a++ {
		fmt.Print(m[a])
	}
	fmt.Println()
}