#!/usr/bin/python3

import sys
import re
def fromNumber(m):
    m = re.sub(r'0', 'a' , m.group(0))
    m = re.sub(r'1', 'b' , m)
    m = re.sub(r'2', 'c' , m)
    m = re.sub(r'3', 'd' , m)
    m = re.sub(r'4', 'e' , m)
    m = re.sub(r'5', 'f' , m)
    m = re.sub(r'6', 'g' , m)
    m = re.sub(r'7', 'h' , m)
    m = re.sub(r'8', 'i' , m)
    m = re.sub(r'9', 'j' , m)
    return str(m)
        
for line in sys.stdin.readlines():
    temp=re.sub(r'\d{4}', fromNumber ,line)
    print(temp.strip('\n'))