columns = int(input(""))

murders_acceptable = 2

row1 = input("")
row2 = input("")

for cell1, cell2 in zip(row1, row2):
    if cell1 == "S" and cell2 == "S":
        murders_acceptable -= 1
        if murders_acceptable == -1:
            break

if murders_acceptable == -1:
    print("NO")
else:
    print("YES")