n,m=list(map(int,input().split()))
a=list()
import sys
for i in range(n):
    a.append(list(map(int,input().split())))
age1,age2=list(map(int,input().split()))
fx=[-1,0,1,0]
fy=[0,1,0,-1]
for i in range(n):
    for j in range(m):
        if a[i][j]==age1:
            for k in range(4):
                x,y=i+fx[k],j+fy[k]
                if x<n and x>=0 and y<m and y>=0 and a[x][y]==age2:
                    print("Y")
                    sys.exit()
print("N")



/**************************************************************
	Problem: 2000
	User: admin
	Language: Python
	Result: Accepted
	Time:100 ms
	Memory:34480 kb
****************************************************************/