7th Birthday
We have a bunch of numbers written from 0 to 9 in the order present in the text input file. The task is to create 7 by replacing the numbers with dashes.
12345678901234 23456789012345 34567890123456 45678901234567 56789012345678 67890123456789 78901234567890 89012345678901 90123456789012
12----------- 2--56789012--5 3456789012--56 456789012--567 56789012--5678 6789012--56789 789012--567890 89012--5678901 9012--56789012