Cat Life

breed = input()
gender = input()
years = 0

if breed == 'Siberian':
    years = 11
elif breed == 'American Shorthair':
    years = 12
elif breed == 'British Shorthair':
    years = 13
elif breed == 'Persian':
    years = 14
elif breed == 'Siamese':
    years = 15
elif breed == 'Ragdoll':
    years = 16
else:
    print(f'{breed} is invalid cat!')

if gender == 'f':
    years += 1

if years > 1:
    print(f'{years * 2} cat months')

ФУНДАМЕНТАЛС РЕШЕНИЯ:

Решение с тернарен оператор:

breed = input()
gender = input()

years = 11 if breed == 'Siberian' else \
        12 if breed == 'American Shorthair' else \
        13 if breed == 'British Shorthair' else \
        14 if breed == 'Persian' else \
        15 if breed == 'Siamese' else \
        16 if breed == 'Ragdoll' else 0

print(f'{(years + (1 if gender == "f" else 0)) * 2} cat months' if years > 1 else f'{breed} is invalid cat!')


Решение с колекция:

breed = input()
gender = input()

years = {'Siberian': 11, 'American Shorthair': 12, 'British Shorthair': 13, 'Persian': 14, 'Siamese': 15, 'Ragdoll': 16}

print(f'{(years[breed] + (1 if gender == "f" else 0)) * 2} cat months' if breed in years else f'{breed} is invalid cat!')