rivers = {
    'nile': 'egypt',
    'mississippi': 'united states',
    'fraser': 'canada',
    'kuskokwim': 'alaska',
    'yangtze': 'china',
    }

for river, country in rivers.items():
    print(f"The {river.title()} flows through {country.title()}.")

print("\nThe following rivers are included in this data set:")
for river in rivers.keys():
    print(f"- {river.title()}")

print("\nThe following countries are included in this data set:")
for country in rivers.values():
    print(f"- {country.title()}")