a=c(10,20,10,10,40,50,20,30)
b=c(10,30,10,20,0,50,30,30)
print("Original data frame:")
ab = data.frame(a,b)
print(ab)
print("Duplicate elements of the said data frame")
print(Duplicate(ab))
print("Unique rows of the said data frame")
print(unique(ab))