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Cardinal Signs:

Aries (I Am) and Libra (I Weigh), Cancer (I Feel) and Capricorn (I Master)

Fixed Signs:
Taurus (I Have) and Scorpio (I Control), Leo (I Create) and Aquarius (I Universalize)

Mutable Signs:
Gemini (I Communicate) and Sagittarius (I Philosophize), Virgo (I Serve) and Pisces (I Believe)

Fire Symbols: Aries, Leo, Sagittarius
Earth Symbols: Taurus, Virgo, Capricorn
Air Symbols: Gemini, Libra, Aquarius
Water Symbols: Cancer, Scorpio, Pisces