import sys
input = sys.stdin.readline

from collections import deque

H,W,K,L,R=map(int,input().split())

if (R-L+1)%2!=0:
    print("No")
    exit()

MAP=[input().strip() for i in range(H)]

F=[[1<<30]*W for i in range(H)]
BACK=[[-1]*W for i in range(H)]

F[0][0]=0

Q=deque()
Q.append((0,0))

while Q:
    x,y=Q.popleft()

    for z,w in [(x+1,y),(x-1,y),(x,y+1),(x,y-1)]:
        if 0<=z<H and 0<=w<W and MAP[z][w]=="." and F[z][w]==1<<30:
            F[z][w]=F[x][y]+1
            Q.append((z,w))
            BACK[z][w]=(x,y)

F2=[[1<<30]*W for i in range(H)]
BACK2=[[-1]*W for i in range(H)]

F2[H-1][W-1]=0

Q=deque()
Q.append((H-1,W-1))

while Q:
    x,y=Q.popleft()

    for z,w in [(x+1,y),(x-1,y),(x,y+1),(x,y-1)]:
        if 0<=z<H and 0<=w<W and MAP[z][w]=="." and F2[z][w]==1<<30:
            F2[z][w]=F2[x][y]+1
            Q.append((z,w))
            BACK2[z][w]=(x,y)


gx=-1
gy=-1
for i in range(H):
    for j in range(W):
        if F[i][j]<=L-1 and F2[i][j]<=K-R:
            gx,gy=i,j

if gx==-1:
    print("No")
    exit()

ANS1=[]
ANS2=[]

x=gx
y=gy

while x!=0 or y!=0:
    z,w=BACK[x][y]

    if z==x+1:
        ANS1.append("U")
    elif z==x-1:
        ANS1.append("D")
    elif w==y+1:
        ANS1.append("L")
    else:
        ANS1.append("R")

    x,y=z,w

x=gx
y=gy

while x!=H-1 or y!=W-1:
    z,w=BACK2[x][y]

    if z==x+1:
        ANS2.append("D")
    elif z==x-1:
        ANS2.append("U")
    elif w==y+1:
        ANS2.append("R")
    else:
        ANS2.append("L")

    x,y=z,w

ANS1.reverse()

if gx+1<H and MAP[gx+1][gy]==".":
    ANS3=["D","U"]*((R-L+1)//2)


elif gx>=1 and MAP[gx-1][gy]==".":
    ANS3=["U","D"]*((R-L+1)//2)

elif gy+1<W and MAP[gx][gy+1]==".":
    ANS3=["R","L"]*((R-L+1)//2)

elif gy>=1 and MAP[gx][gy-1]==".":
    ANS3=["L","R"]*((R-L+1)//2)

ANS=ANS1+ANS3+ANS2

print("Yes")
print("".join(ANS))