F is the sixth letter of the English and Latin alphabets. In terms of the story of alphabet and days of the week, the sixth day is Thursday which corresponds to Sagittarius (Jupiter, Jove) in terms of the zodiac square. If we take the pattern for E and focus only on the lines for Tuesday and Wednesday we arrive at F. This sign for F is also the sign for Ansuz in the runes, which relates to the god Odin. F is also the hieroglyphic for horned viper.