## Python Program

Using the mobile keypad layout:

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1 => 1, 2 => ABC, 3 => DEF, 4 => GHI, 5 => JKL,6 => MNO, 7 => PQRS, 8 => TUV, 9 => WXYZ, 0 => 0+_

For a mobile number, generate the possible combinations of alphabets matching each digit of the number.

I have written the program in Python. This program will generate all possible combinations of alphabets for the phone number given by the user.

**For Example:**

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Enter your mobile number: 9854386072

The sequence combinations are:

WTJGDTM PA

WUJGDUM PA

WTKHDUM PA

…

ZVLIFVO_SC

[code lang="py"]#! /usr/bin/env python

# -*- coding: utf-8 -*-

dict = {0 : " _+", 1 : "1", 2 : "abc", 3 : "def", 4 : "ghi",

5 : "jkl", 6 : "mno", 7 : "pqrs", 8 : "tuv", 9 : "wxyz"}

lis = [list(dict.get(x)) for x in range(0, 10)]

"""

the above line generate the list of values

eg: [[' ', '_', '+'], ['1'], ['a', 'b', 'c']....['w', 'x','y', 'z']]

"""

mob_num = list(raw_input("Enter mobile number: "))

#get the input(phone number) from the user as list

num = [int(x) for x in mob_num] #convert list of strings to list of integers

phonekey = [lis[x] for x in num] #re-arranging the list as per phone number

res = ["".join([a,b,c,d,e,f,g,h,i,j]) for a in phonekey[0] for b in phonekey[1]

for c in phonekey[2] for d in phonekey[3] for e in phonekey[4]

for f in phonekey[5] for g in phonekey[6] for h in phonekey[7]

for i in phonekey[8] for j in phonekey[9]]

for x in res:

print x[/code]

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I hope this post was helpful!