import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################

def rot(s):
    x, y = 0, 0
    ans = 0
    for c in s:
        if c == "R":
            if x == 0:
                if y <= 0:
                    ans += 1
                else:
                    ans -= 1
            x += 1
        elif c == "L":
            if x == 1:
                if y <= 0:
                    ans -= 1
                else:
                    ans += 1
            x -= 1
        elif c == "U":
            if y == 0:
                if x <= 0:
                    ans -= 1
                else:
                    ans += 1
            y += 1
        else:
            if y == 1:
                if x <= 0:
                    ans += 1
                else:
                    ans -= 1
            y -= 1
    assert x == 0 and y == 0 and ans % 4 == 0
    # print(ans)
    return ans

def convert(s):
    res = []
    for i in s:
        if i == "L":
            res.append("R")
        elif i == "R":
            res.append("L")
        else:
            res.append(i)
    return "".join(res)


n, m = na()
ans = 0
for i in range(n):
    s = input()
    #print(rot(s) ,rot(convert(s)))
    X = rot(s)//4
    Y = -rot(convert(s))//4
    if X + Y == 0 and X % 4 == 0:
        ans += 1

print(ans)