module Helpers:sig
..end
val blit_string_of_int_4_digits : String.t -> pos:int -> int -> unit
val blit_string_of_int_2_digits : String.t -> pos:int -> int -> unit
val blit_string_of_int_3_digits : String.t -> pos:int -> int -> unit
val parse_two_digits : String.t -> int -> int
val parse_four_digits : String.t -> int -> int