def main():
    C = list(input())
    C += list(input())
    count = 0
    m = 0
    for x in range(len(C)):
        if C[x]=='o':
            count += 1
            if m < count:
                m = count
        else:
            count = 0
    if m == 0 or m == 1:
        print(0)
    else:
        print(m)
        
if __name__ == '__main__':
    main()