import pymorphy2

def process_text(text):
    words = text.split(' ')
    arr_words = []
    for word in words:
        morph = pymorphy2.MorphAnalyzer()
        normal_form = morph.parse(word)
        arr_words.append(normal_form[0].normal_form)
    result = ' '.join(arr_words)
    return result