PRO4X

#Quadrilaterals #Letters presenting a special form of writing #Numerals presenting a special form of writing #Two quadrilaterals, one inside the other #Quadrilaterals containing one or more numerals #Quadrilaterals containing one or more letters #Quadrilaterals with dark surfaces or parts of surfaces #Series of letters presenting different forms of writing #Series of letters in different dimensions #Letters in light-coloured characters on a dark background #Numerals juxtaposed or joined to a letter or a figurative element