# Series Write a program that will take a string of digits and give you all the contiguous substrings of length `n` in that string. For example, the string "49142" has the following 3-digit series: - 491 - 914 - 142 And the following 4-digit series: - 4914 - 9142 And if you ask for a 6-digit series from a 5-digit string, you deserve whatever you get. Note that these series are only required to occupy *adjacent positions* in the input; the digits need not be *numerically consecutive*. To run the tests simply run the command `go test` in the exercise directory. If the test suite contains benchmarks, you can run these with the `-bench` flag: go test -bench . For more detailed info about the Go track see the [help page](http://exercism.io/languages/go). ## Source A subset of the Problem 8 at Project Euler [http://projecteuler.net/problem=8](http://projecteuler.net/problem=8) ## Submitting Incomplete Problems It's possible to submit an incomplete solution so you can see how others have completed the exercise.