package main

import (
    "bufio"
    "crypto/rand"
    "fmt"
    "io/ioutil"
    "log"
    "math/big"
    "os"
    "strconv"
    "strings"
    "unicode"
)

const (
    charsPerLine = 48
    chunkSize    = 6
    cols         = 8
    demo         = true