import re
   
def putSpace(input):

    words = re.findall('[A-Z][a-z]*', input)

    for i in range(0,len(words)):
      words[i]=words[i][0].lower()+words[i][1:]
    print(' '.join(words))

if __name__ == "__main__":
    input = 'BruceWayneIsBatman'
    putSpace(input)