fun printSequence(sequence: String, width: Int = 50) {

    fun printWithLabel(label: Any, data: Any) =
        label.toString().padStart(5).also { println("$it: $data") }

    println("SEQUENCE:")
    sequence.chunked(width).forEachIndexed() { i, chunk ->
        printWithLabel(i * width + chunk.length, chunk)
    }

    println("BASE:")
    sequence.groupingBy { it }.eachCount().forEach { (k, v) ->
        printWithLabel(k, v)
    }
    printWithLabel("TOTALS", sequence.length)
}

const val BASE_SEQUENCE = "CGTAAAAAATTACAACGTCCTTTGGCTATCTCTTAAACTCCTGCTAAATGCTCGTGCTTTCCAATTATGTAAGCGTTCCGAGACGGGGTGGTCGATTCTGAGGACAAAGGTCAAGATGGAGCGCATCGAACGCAATAAGGATCATTTGATGGGACGTTTCGTCGACAAAGTCTTGTTTCGAGAGTAACGGCTACCGTCTTCGATTCTGCTTATAACACTATGTTCTTATGAAATGGATGTTCTGAGTTGGTCAGTCCCAATGTGCGGGGTTTCTTTTAGTACGTCGGGAGTGGTATTATATTTAATTTTTCTATATAGCGATCTGTATTTAAGCAATTCATTTAGGTTATCGCCGCGATGCTCGGTTCGGACCGCCAAGCATCTGGCTCCACTGCTAGTGTCCTAAATTTGAATGGCAAACACAAATAAGATTTAGCAATTCGTGTAGACGACCGGGGACTTGCATGATGGGAGCAGCTTTGTTAAACTACGAACGTAAT"

fun main() = printSequence(BASE_SEQUENCE)