package main

import (
	"bufio"
	"fmt"
	"os"
	"sort"
)

func main() {
	s := bufio.NewScanner(os.Stdin)
	max := 0
	r := results{}
	for s.Scan() {
		if len(s.Text()) == 0 {
			continue
		}
		if len(s.Text()) > max {
			max = len(s.Text())
		}
		r = append(r, result{s.Text(), freq(s.Text())})
	}
	if err := s.Err(); err != nil {
		panic(err)
	}

	sort.Sort(r)

	f := fmt.Sprintf("%%%ds: %%v", max)
	for _, r := range r {
		fmt.Printf(f+"\n", r.name, r.h)
	}
}

type result struct {
	name string
	h    histogram
}
type results []result

type histogram []letter

type letter struct {
	r     rune
	count int
}

func (l letter) String() string {
	return fmt.Sprintf("%v: %d", string(l.r), l.count)
}

func freq(in string) histogram {
	m := map[rune]int{}
	for _, r := range in {
		if r == ' ' {
			continue
		}
		m[r]++
	}

	r := histogram{}
	for k, v := range m {
		r = append(r, letter{k, v})
	}
	sort.Sort(r)
	return r
}