a,b,c,d = map(int,(input().split()))
x = c-a
y = d-b
ans = []
if x > 0 and y > 0:
    for i in range(y):
        ans.append("U")
    for i in range(x):
        ans.append("R")
    ans.append("U")
    for i in range(x+1):
        ans.append("L")
    for i in range(y+1):
        ans.append("D")
    ans.append("R")

    for i in range(x):
        ans.append("R")
    for i in range(y):
        ans.append("U")
    ans.append("R")
    for i in range(y+1):
        ans.append("D")
    for i in range(x+1):
        ans.append("L")
    ans.append("U")

if x > 0 and y < 0:
    for i in range(-y):
        ans.append("D")
    for i in range(x):
        ans.append("R")
    ans.append("D")
    for i in range(x+1):
        ans.append("L")
    for i in range(-y+1):
        ans.append("U")
    ans.append("R")

    for i in range(x):
        ans.append("R")
    for i in range(-y):
        ans.append("D")
    ans.append("R")
    for i in range(-y+1):
        ans.append("U")
    for i in range(x+1):
        ans.append("L")
    ans.append("D")

if x < 0 and y > 0:
    for i in range(y):
        ans.append("U")
    for i in range(-x):
        ans.append("L")
    ans.append("U")
    for i in range(-x+1):
        ans.append("R")
    for i in range(y+1):
        ans.append("D")
    ans.append("L")

    for i in range(-x):
        ans.append("L")
    for i in range(y):
        ans.append("U")
    ans.append("L")
    for i in range(y+1):
        ans.append("D")
    for i in range(-x+1):
        ans.append("R")
    ans.append("U")

if x < 0 and y < 0:
    for i in range(-y):
        ans.append("D")
    for i in range(-x):
        ans.append("L")
    ans.append("D")
    for i in range(-x+1):
        ans.append("R")
    for i in range(-y+1):
        ans.append("U")
    ans.append("L")

    for i in range(-x):
        ans.append("L")
    for i in range(-y):
        ans.append("D")
    ans.append("L")
    for i in range(-y+1):
        ans.append("U")
    for i in range(-x+1):
        ans.append("R")
    ans.append("D")

if y==0:
    if x>0:
        for i in range(x):
            ans.append("R")
        ans.append("U")
        for i in range(x):
            ans.append("L")
        ans.append("D")

        ans.append("D")
        for i in range(x):
            ans.append("R")
        ans.append("U")
        ans.append("R")
        ans.append("D")
        ans.append("D")
        for i in range(x+2):
            ans.append("L")
        ans.append("U")
        ans.append("U")
        ans.append("R")
    if x<0:
        x = -x
        for i in range(x):
            ans.append("L")
        ans.append("U")
        for i in range(x):
            ans.append("R")
        ans.append("D")

        ans.append("D")
        for i in range(x):
            ans.append("L")
        ans.append("U")
        ans.append("L")
        ans.append("D")
        ans.append("D")
        for i in range(x+2):
            ans.append("R")
        ans.append("U")
        ans.append("U")
        ans.append("L")

if x==0:
    if y>0:
        for i in range(y):
            ans.append("U")
        ans.append("R")
        for i in range(y):
            ans.append("D")
        ans.append("L")

        ans.append("L")
        for i in range(y):
            ans.append("U")
        ans.append("R")
        ans.append("U")
        ans.append("L")
        ans.append("L")
        for i in range(y+2):
            ans.append("D")
        ans.append("R")
        ans.append("R")
        ans.append("U")
    if y<0:
        y = -y
        for i in range(y):
            ans.append("D")
        ans.append("R")
        for i in range(y):
            ans.append("U")
        ans.append("L")

        ans.append("L")
        for i in range(y):
            ans.append("D")
        ans.append("R")
        ans.append("D")
        ans.append("L")
        ans.append("L")
        for i in range(y+2):
            ans.append("U")
        ans.append("R")
        ans.append("R")
        ans.append("D")

output = "".join(ans)
print(output)

Measured memory_bytes: 40176