Write a Python program to create and display all combinations of letters, selecting each letter from a different key in a dictionary.

Notes:

• Define a function which will accept a dict parameter.
• For all present keys it will fetch values and will create a pair as described in above example.
• Store it in list and return.

Instructions:

• Program should be written in file build.py

• Function name should be solution.

• Input

   Type:  Dictionary
   Value: {'one':['a','b'], 'two':['c','d']}
  

• Expected Output

    Type:  List
    Value: [ac, ad, bc, bd]