Arabic Extended-C characters supported by the Unifont Upper font

Character	Image
ARABIC SMALL LOW WORD SAKTA (U+10EFD)
ARABIC SMALL LOW WORD QASR (U+10EFE)
ARABIC SMALL LOW WORD MADDA (U+10EFF)

Count: 3

Character
ARABIC LETTER DAL WITH TWO DOTS VERTICALLY BELOW (U+10EC2)
ARABIC LETTER TAH WITH TWO DOTS VERTICALLY BELOW (U+10EC3)
ARABIC LETTER KAF WITH TWO DOTS VERTICALLY BELOW (U+10EC4)
ARABIC COMBINING ALEF OVERLAY (U+10EFC)

Count: 4