using System;using System.Collections;class P{static void Main(){Hashtable d=new Hashtable();string s,t="";while(null!=(s=Console.ReadLine()))t+=s;foreach(char c in t)d[c]=d.Contains(c)?(int)d[c]+1:1;ArrayList l=new ArrayList(d.Keys);l.Sort();foreach(char x in l)Console.WriteLine(x+": {0,2}",d[x]);}}