import sys

az =["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]

sum_az = [0 for x in range(26)]



for x in sys.stdin.read().lower():

    for i in range(26):

        for j in range(len(x)):

            if x[j] == az[i]:

                sum_az[i] += 1





for i in range(26):

    print(("%s : %d" % (az[i], sum_az[i])))

                
import sys

az =["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]

sum_az = [0 for x in range(26)]



for x in sys.stdin.read().lower():

    for i in range(26):

        if x == az[i]:

            sum_az[i] += 1





for i in range(26):

    print(("%s : %d" % (az[i], sum_az[i])))

                
import sys

az = [
    "a",
    "b",
    "c",
    "d",
    "e",
    "f",
    "g",
    "h",
    "i",
    "j",
    "k",
    "l",
    "m",
    "n",
    "o",
    "p",
    "q",
    "r",
    "s",
    "t",
    "u",
    "v",
    "w",
    "x",
    "y",
    "z",
]
sum_az = [0 for x in range(26)]
for x in sys.stdin.read().lower():
    for i in range(26):
        for j in range(len(x)):
            if x[j] == az[i]:
                sum_az[i] += 1
for i in range(26):
    print(("%s : %d" % (az[i], sum_az[i])))

import sys

az = [
    "a",
    "b",
    "c",
    "d",
    "e",
    "f",
    "g",
    "h",
    "i",
    "j",
    "k",
    "l",
    "m",
    "n",
    "o",
    "p",
    "q",
    "r",
    "s",
    "t",
    "u",
    "v",
    "w",
    "x",
    "y",
    "z",
]
sum_az = [0 for x in range(26)]
for x in sys.stdin.read().lower():
    for i in range(26):
        if x == az[i]:
            sum_az[i] += 1
for i in range(26):
    print(("%s : %d" % (az[i], sum_az[i])))

-        for j in range(len(x)): -            if x[j] == az[i]: -                sum_az[i] += 1 +        if x == az[i]: +            sum_az[i] += 1