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rho
Rho (uppercase Ρ, lowercase ρ or ϱ; Greek: ρο or ρω) is the 17th letter of the Greek alphabet. In the system of Greek numerals it has a value of 100. It is derived from Phoenician letter res . Its uppercase form uses the same glyph, Ρ, as the distinct Latin letter P; the two letters have different Unicode encodings.