what is the origin of the suits in a deck of playing cards?

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it was in europe,where playing cards have been used for at least 800 years,that the cards were divided into groups or suits...each of the suits represented one of the four social classes of life in the middle ages...the novlity were represented by swords,which later became spades.....the clergy were represented by cups,which later became hearts...merchant were represented by coins,which turned into diamonds,and peasants were represented by stases,which later became clubs.