#!/usr/bin/env python3

import sys

rawInput = sys.stdin.readlines()
splitInput = [l.strip() for l in rawInput]

for c in splitInput:
    try:
        int(c)
        is_int = True
    except ValueError:
        is_int = False
    assert is_int, "Input must be in decimal form, and separated by newlines"

rawOutput = []
for c in splitInput:
    c2 = chr(int(c))
    rawOutput.append(c2)

output = ""
for c in rawOutput:
    output += c

print(output)