[0606] Init test - RED
[0606] add string calc class
Green
Refactor
Test with string contain 1 number
Green
Refactor
Test with string contains 2 numbers
Green
Test with string contains 3 or more than 3 numbers
Refactor
Test with string contains more than 1 delimiters
Green
Refactor
Test with string support different delimiters
Green
Refactor