package main

import (
	"fmt"
	"strings"
)

func main() {
	var n, k int
	if _, err := fmt.Scan(&n, &k); err != nil {
		return
	}

	mid := (n + 1) / 2

	if k < mid {
		fmt.Print("L" + strings.Repeat("DRULUL", k-1))
	} else {
		c := n - 1 - k
		fmt.Print(strings.Repeat("RDLURU", c) + "L" + strings.Repeat("DRULUL", mid-2))
	}
}