http://www.problemotd.com/problem/muspi-merol/

MuspiMerol.go

package main

import (
	"fmt"
	"math/rand"
	"strings"
	"time"
)

var (
	ra *rand.Rand
)

func main() {

	ra = rand.New(rand.NewSource(time.Now().Unix()))

	text()
}

func text() {

	fmt.Println("Muspi Merol")

	pNum := randRange(5, 20)
	for i := 0; i < pNum; i++ {
		paragraph()
	}

}

func paragraph() {

	sNum := randRange(3, 7)
	lineLen := 0

	for i := 0; i < sNum; i++ {
		lineLen = sentence(lineLen)
	}
	fmt.Println()
}

func sentence(lineLen int) int {

	wNum := randRange(3, 15)

	for i := 0; i < wNum; i++ {
		w, wLen := word(i == wNum-1)
		if i == 0 {
			w = strings.Title(w)
		}
		if lineLen+wLen > 80 {
			fmt.Printf("\n%s", w)
			lineLen = wLen
		} else {
			if lineLen == 0 {
				fmt.Printf("%s", w)
				lineLen += wLen
			} else {
				fmt.Printf(" %s", w)
				lineLen += wLen + 1
			}
		}
	}

	return lineLen
}

var wBuf = make([]byte, 10)
var percentV = 5
var vowels = []byte{'p', 'o', 't', 'd'}

func word(isLast bool) (string, int) {

	len := randRange(1, 11)
	for i := 0; i < len; i++ {
		if randRange(0, 100) < percentV {
			wBuf[i] = vowels[randRange(0, 4)]
		} else {
			wBuf[i] = 'a' + byte(randRange(0, 26))
		}
	}
	if isLast {
		return string(wBuf[:len]) + ".", len + 1
	}
	return string(wBuf[:len]), len
}

func randRange(from, to int) int {

	d := ra.Int() % (to - from)
	return from + d
}