If a=1, b=2, c=3,....z=26. Given a string, find all possible codes that string can generate. Give a count as well as print the strings. For example: Input: "1123". You need to general all valid alphabet codes from this string. Output List aabc //a = 1, a = 1, b = 2, c = 3 kbc // since k is 11, b = 2, c= 3 alc // a = 1, l = 12, c = 3 aaw // a= 1, a =1, w= 23 kw // k = 11, w = 23