https://cses.fi/paste/bf851c39006083922f9992/inp = input()
mx = 1
cur = 1
p = inp[0];
for i in range(1, len(inp)):
c = inp[i]
if (c == p):
cur = cur + 1
mx = max(mx, cur)
else:
cur = 1
p = c
print(mx) 