def sum_dataset(dataset_number):
    sum = 0

    for a in dataset_number:
        sum += a

    return sum

def upper_letter_count(dataset_sentence):
    upper = 0
    for count in dataset_sentence:
        if count.isupper():
            upper += 1
    return upper

def lower_letter_count(dataset_sentence):
    lower = 0
    for count in dataset_sentence:
        if count.islower():
            lower += 1
    return lower

def sum_letters_in_sentence(dataset_sentence):
    lower=0
    upper=0
    result = lower + upper
    for count in dataset_sentence:
        if(count.islower()):
            lower+=1
        else:
            upper+=1
    return result 

########################################################################################################################

def verify(message, actual, expected):
    print(message)
    if actual != expected:
        print("=======> FAILED! <=======")
        print(f"Got value <{actual}>")
        print(f"Expected value is <{expected}>")
    else:
        print("SUCCESS!")
    print()

dataset_sentence1 = ["My Year was so Great, but it was hard!"]
dataset_sentence2 = ["HeakfhZUWmvbhfPEHFHT123"]
dataset_sentence3 = ["Madame, I demand, I am a maid named Angelo"]
dataset_sentence4 = ["bAgahaJemanbDneorIJahdhrEa4"]
dataset_sentence5 = ["The World is not enough"]
dataset_sentence6 = ["SaipPuakivIkAuPpias"]
dataset_sentence7 = ["i lOve tO reAd bOoKs, esPecIaLly mysTerY nOvels"]
dataset_sentence8 = ["i aM eNjoyiNg thiS coOl weatHer, It's so rEfReshing"]
dataset_sentence9 = ["i HaVe a dOg namEd bUddy, hE iS a fRienDlY aNd fUn cOmPanion"]

dataset_number1 = [23, 34, 89, 12, -12, 92, 123, 9, 204, -34, -100, 34, 19, 67, -1]
dataset_number2 = [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10]
dataset_number3 = [927, 142, -816, 682, -6599, 1000, -8, 334, 0, 6654, -8361, 555, 121, 680]

sum_dataset_test = [dataset_number1, dataset_number2, dataset_number3, [], [0]]
upper_letter_count_test = [dataset_sentence1, dataset_sentence2, dataset_sentence3, '']
lower_letter_count_test = [dataset_sentence4, dataset_sentence5, dataset_sentence6, '']
sum_letters_in_sentence_test = [dataset_sentence7, dataset_sentence8, dataset_sentence9, '']

########################################################################################################################

for i in range(len(sum_dataset_test)):
    result = sum_dataset(sum_dataset_test[i])
    expected = sum(sum_dataset_test[i])
    verify(f"SUM_DATASET TEST {i+1}", result, expected)

########################################################################################################################

for i in range(len(upper_letter_count_test)):
    sentence = upper_letter_count_test[i]
    expected_result = sum(1 for letter in sentence if letter.isupper()) if isinstance(sentence, str) else 0
    verify(f"UPPER_LETTER_COUNT TEST {i+1}", upper_letter_count(sentence), expected_result)

########################################################################################################################

for i in range(len(lower_letter_count_test)):
    sentence = lower_letter_count_test[i]
    expected_result = sum(1 for letter in sentence if letter.islower()) if isinstance(sentence, str) else 0
    verify(f"LOWER_LETTER_COUNT TEST {i+1}", lower_letter_count(sentence), expected_result)

########################################################################################################################        

for i in range(len(sum_letters_in_sentence_test)):
    sentence = sum_letters_in_sentence_test[i]
    expected_upper = sum(1 for letter in sentence if letter.isupper()) if isinstance(sentence, str) else 0
    expected_lower = sum(1 for letter in sentence if letter.islower()) if isinstance(sentence, str) else 0
    expected_result = expected_upper + expected_lower
    verify(f"SUM_LETTERS_IN_SENTENCE TEST {i+1}", sum_letters_in_sentence(sentence), expected_result)

########################################################################################################################