start Numbers/names.jl. Can handle hundreds,tens,and ones columns.
readline(STDIN) -> readline() in binary_decimal.jl
readline(STDIN) -> readline() in calc.jl
readline(STDIN) -> readline() in change.jl
readline(STDIN) -> readline() in credit_card_validator.jl
readline(STDIN) -> readline() in distance.jl
readline(STDIN) -> readline() in factorial, fibonacci, next_prime, pi, prime, and tile.jl