N1_v3_ok

s=''
with open('24.txt') as f:
    s = f.readline()

s = s.replace('S', 'Q')
s = s.replace('R', 'Q')
s  = s[:-1]
s += 'QQa'
#print(s)

kmax = 0
k=0
i=0

#for i in range(len(s)):
    #print(i, s[i], end=' ')
#print()

i=0
while i + 1 < len(s):
    if s[i] + s[i + 1] == 'QQ':
        #print("i = ", i)
        k += 1
        kmax = max(k, kmax)
        i += 1
        k = 0
        continue
    k += 1
    i += 1

print()
print("kmax")
print(kmax)