function [ output] = dasher( string )

letters = "qwertyuiopasdfghjklzxcvbnm";
numbers = "1234567890";

numbercount = 0;
lettercount = 0;
plate = '';
i = 1;
while i < length(string)
    if (contains(numbers,string(i)))
        lettercount = 0;
        j = 1;
        numbercount = numbercount + 1;
        while(j+i < length(string) + 1 && contains(numbers,string(i+j)))
            j = j + 1;
            numbercount = numbercount + 1;
        end
        if (numbercount == 2)
            plate(length(plate) + 1) = string(i);
            plate(length(plate) + 1) = string(i + 1);
            plate(length(plate) + 1) = '-';
            i = i + 2;
        end
        if (numbercount == 1)
            plate(length(plate) + 1) = string(i);
            plate(length(plate) + 1) = '-';
            i = i + 1;
        end
    elseif (contains(letters,string(i)))
        numbercount = 0;
        j = 1;
        lettercount = lettercount + 1;
        while(j+i < length(string) + 1 && contains(letters,string(i+j)))
            j = j + 1;
            lettercount = lettercount + 1;
        end
        if (lettercount == 2)
            plate(length(plate) + 1) = string(i);
            plate(length(plate) + 1) = string(i + 1);
            plate(length(plate) + 1) = '-';
            i = i + 2;
        end
        if (lettercount == 3)
            plate(length(plate) + 1) = string(i);
            plate(length(plate) + 1) = string(i + 1);
            plate(length(plate) + 1) = string(i + 2);
            plate(length(plate) + 1) = '-';
            i = i + 3;
        end
        if (lettercount == 4)
            plate(length(plate) + 1) = string(i);
            plate(length(plate) + 1) = string(i+1);
            plate(length(plate) + 1) = '-';
            plate(length(plate) + 1) = string(i+2);
            plate(length(plate) + 1) = string(i+3);
            i = i + 4;
        end
    else
         i = i + 1;
    end
end
if (i == length(string))
    plate(length(plate) + 1) = string(i);
end
output = plate;
end