Ответ:
x = 0
y = 0
str1 = input()
count = 0
for k in range(len(str1)):
if str1[k] == 'R':
x += 1
elif str1[k] == 'L':
x -= 1
elif str1[k] == 'U':
y += 1
else:
y -= 1
if x == 0 and y == 0:
count += 1
print(count)
