tens  = {"ten", "twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety"};
teens = {"eleven", "twelve", "thirteen", "fourteen", "fifteen", 
         "sixteen", "seventeen", "eighteen", "nineteen"};
ones  = {"one", "two", "three", "four", "five", "six", "seven", "eight", "nine"};

formatNum[{a_, b_}] := tens[[a]] <> "-" <> ones[[b]]
formatNum[{a_, 0}] := tens[[a]]
formatNum[{1, b_}] := teens[[b]]
formatNum[{b_}] := ones[[b]]
formatNum[{0}] := "no more"

capitalize[str_] := ToUpperCase[StringTake[str, 1]] <> StringDrop[str, 1]

pluralize[str_, _] := str <> "s"
pluralize[str_, 1] := str
pluralize[str_ /; StringMatchQ[