This feature takes a string and counts how many double letters are in the string. To use this feature call the pairs method with a string of your choosing and it will return number of pairs.
This feature takes a string and counts how many sixes are present. It also checks to see if there is a sequence of ones in a row (aka 11) in the string, it prints out a statement on whether there is such a sequence or not. To use this feature call the count method with a string of your choosing.