def count():
    sentence = "Я пришел, я ушел, я нашел"
    str1 = 'Я'
    str2 = 'я'
    if str1.lower() == str2.lower():
        count1 = sentence.count(str1)
        count2 = sentence.count(str2)
        print("The count of 'Я' is", count1+count2)

    sentence2 = sentence.count('пришел')
    sentence3 = sentence.count('ушел')
    sentence4 = sentence.count('нашел')
    

    print("The count of 'пришел' is", sentence2)
    print("The count of 'ушел' is", sentence3)
    print("The count of 'нашел' is", sentence4)

count()

# from collections import defaultdict

# test_sentence = ["Я", "пришел", "я", "ушел", "я", "нашел"]

# print("The original sentence is : " + str(test_sentence))

# res = defaultdict(int)

# for count in test_sentence:
#     res[count.lower()] += 1

# print("Strings Frequency : " +str(dict(res)))