# coding: utf-8





import sys

import itertools



def move(x,y):

    xs = "R"*x if x > 0 else "L"*(-x)

    ys = "U"*y if y > 0 else "D"*(-y)

    return (xs, ys)



def main():

    sx, sy, tx, ty = list(map(int,sys.stdin.read().split()))

    x = tx - sx

    y = ty - sy



    xs, ys = move(x,y)

    ans = ys + xs



    xs, ys = move(-x,-y)

    ans += ys + xs



    xs, ys = move(x+1,y+1)

    ans += "L" + ys + xs + "D" 



    xs, ys = move(-(x+1),-(y+1))

    ans += "R" + ys + xs + "U" 



    sys.stdout.write(ans)



if __name__ == '__main__':

    main()  

# coding: utf-8





import sys



LEFT = "L"

RIGHT = "R"

UP = "U"

DOWN = "D"



def move(x,y):

    xs = RIGHT*x if x > 0 else LEFT*(-x)

    ys = UP*y if y > 0 else DOWN*(-y)

    return ys + xs



def main():

    sx, sy, tx, ty = list(map(int,sys.stdin.read().split()))



    x = tx - sx

    y = ty - sy



    ans = ""

    ans += move(x,y)

    ans += move(-x,-y)

    ans += LEFT + move(x+1,y+1) + DOWN

    ans += RIGHT + move(-(x+1),-(y+1)) + UP



    sys.stdout.write(ans)



if __name__ == '__main__':

    main()  

# coding: utf-8
import sys
import itertools


def move(x, y):
    xs = "R" * x if x > 0 else "L" * (-x)
    ys = "U" * y if y > 0 else "D" * (-y)
    return (xs, ys)


def main():
    sx, sy, tx, ty = list(map(int, sys.stdin.read().split()))
    x = tx - sx
    y = ty - sy
    xs, ys = move(x, y)
    ans = ys + xs
    xs, ys = move(-x, -y)
    ans += ys + xs
    xs, ys = move(x + 1, y + 1)
    ans += "L" + ys + xs + "D"
    xs, ys = move(-(x + 1), -(y + 1))
    ans += "R" + ys + xs + "U"
    sys.stdout.write(ans)


if __name__ == "__main__":
    main()

# coding: utf-8
import sys

LEFT = "L"
RIGHT = "R"
UP = "U"
DOWN = "D"


def move(x, y):
    xs = RIGHT * x if x > 0 else LEFT * (-x)
    ys = UP * y if y > 0 else DOWN * (-y)
    return ys + xs


def main():
    sx, sy, tx, ty = list(map(int, sys.stdin.read().split()))
    x = tx - sx
    y = ty - sy
    ans = ""
    ans += move(x, y)
    ans += move(-x, -y)
    ans += LEFT + move(x + 1, y + 1) + DOWN
    ans += RIGHT + move(-(x + 1), -(y + 1)) + UP
    sys.stdout.write(ans)


if __name__ == "__main__":
    main()

-import itertools + +LEFT = "L" +RIGHT = "R" +UP = "U" +DOWN = "D" -    xs = "R" * x if x > 0 else "L" * (-x) -    ys = "U" * y if y > 0 else "D" * (-y) -    return (xs, ys) +    xs = RIGHT * x if x > 0 else LEFT * (-x) +    ys = UP * y if y > 0 else DOWN * (-y) +    return ys + xs -    xs, ys = move(x, y) -    ans = ys + xs -    xs, ys = move(-x, -y) -    ans += ys + xs -    xs, ys = move(x + 1, y + 1) -    ans += "L" + ys + xs + "D" -    xs, ys = move(-(x + 1), -(y + 1)) -    ans += "R" + ys + xs + "U" +    ans = "" +    ans += move(x, y) +    ans += move(-x, -y) +    ans += LEFT + move(x + 1, y + 1) + DOWN +    ans += RIGHT + move(-(x + 1), -(y + 1)) + UP