#! /bin/bash

ran_cron () {
echo "$(echo ""$(echo $((RANDOM % 9 + 15)))" "$(echo $((RANDOM % $(echo $((RANDOM % 3 + 4))) + 4)))","$(echo $((RANDOM % $(echo $((RANDOM % 3 + 4))) + 10)))","$(echo $((RANDOM % 9 + 12)))","$(echo $((RANDOM % 9 + 15)))" * * * ")"
}

ran_cron