I=input
N,M=map(int,I().split())
a=x=y=0
D={'U':[0,2,-M,M,2,2],'R':[2,0,0,2,-M,M],'D':[0,-2,-M,M,0,0],'L':[-2,0,-2,0,-M,M]}
for i in range(N):
	C=[0]
	for c in I():
		e,f,g,h,i,j=D[c]
		x+=e;y+=f
		if g<=x<=h and i<=y<=j:C+=[c]
	j=1
	while j<len(C)-1:
		c,d=C[j],C[j+1]
		if(c=='U'and d=='D')or(c=='D'and d=='U')or(c=='L'and d=='R')or(c=='R'and d=='L'):C.pop(j+1);C.pop(j);j-=1
		else:j+=1
	a+=len(C)<2
print(a)