50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 64, 65, 66, 68, 69, 70
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51,52,54,55,56,57,58,60,62,63,64,65,66,68,69 are the composite numbers between 50 and 70.
All of them except for 53, 59, 61 and 67 which are prime numbers
all the compounds in the world are either 50 70 115 150
53, 59, 61, 67.
70 and 90