Ubbi Dubbi (also Pig Greek or Double Dutch in English, or Ububbubi Dububbubi in Ubbi Dubbi) is a language game that is popular with children. They use it as a secret language or as a joke. The language became popular thanks to the long-term television program ZOOM¹ on PBS² and one of its variants was used by Bill Cosby³ in his dentist sketch and for the voice-over he did for Mushmouth from the series Fat Albert and the Cosby Kids⁴. However, the language goes back to the starting days of the American English in the 17th century.

The principle of Ubbi Dubbi is simple. English words are transformed by having a series of vowels preceded by ub. If the first vowel of the sequence is an uppercase letter, that vowel is preceded by Ub.

Assignment

• Write a function text2ubbi to which an (English) sentence has to be given. The function should print that sentence translated to Ubbi Dubbi.

• Write a function ubbi2text to which a sentence in Ubbi Dubbi has to be given. The function must print the original (English) sentence. 

Example

>>> text2ubbi('speak')
'spubeak'
>>> text2ubbi('Hello')
'Hubellubo'
>>> text2ubbi('Extra')
'Ubextruba'
>>> text2ubbi('Mississippi')
'Mubissubissubippubi'
>>> text2ubbi('zoom')
'zuboom'
>>> text2ubbi('Ubbi Dubbi')
'Ububbubi Dububbubi'
>>> text2ubbi('Hi, how are you?')
'Hubi, hubow ubarube yubou?'

>>> ubbi2text('spubeak')
'speak'
>>> ubbi2text('Hubellubo')
'Hello'
>>> ubbi2text('Ubextruba')
'Extra'
>>> ubbi2text('Mubissubissubippubi')
'Mississippi'
>>> ubbi2text('zuboom')
'zoom'
>>> ubbi2text('Ububbubi Dububbubi')
'Ubbi Dubbi'
>>> ubbi2text('Hubi, hubow ubarube yubou?')
'Hi, how are you?'