def checkNumber(i):
    if (i == '0'
            or i == '1'
            or i == '2'
            or i == '3'
            or i == '4'
            or i == '5'
            or i == '6'
            or i == '7'
            or i == '8'
            or i == '9'):
        return i
    else:
        return None
def openFile(fileName):
    with open(fileName, "r", encoding="utf-8") as file:
        for row in file:
            lastCharacter = ''
            checkWord =''
            for i in row:
                if i == checkNumber(i):
                    if lastCharacter != checkNumber(lastCharacter):
                        checkWord += ' '
                        checkWord += i
                    else:
                        checkWord += i
                if i == '\n':
                    if checkWord != '':
                        print(checkWord)
                        checkWord = ''
                lastCharacter = i



print('---------------------SHAKESPEARE.EXP--------------------------------------')
openFile('polish_wiki_excerpt.exp')
print('----------------------SHAKESPEARE.EXP-----------------------------------')
openFile('polish_wiki_excerpt.in')
print('------------------------SIMPLE.IN------------------------------------')
openFile('simple.in')
print('-----------------------SIMPLE.EXP--------------------------------------')
openFile('simple.exp')