ocdu m()
("Iu 1   := ")
 := (())
("Iu 2  b := ")
b := (())

("  + b = ",+b)
("  - b = ",-b)
("  * b = ",*b)
("   b = ",b, " u  0")
("  % b = ",%b, "   c ")
("  ^ b = ",^b)