def setOf(a):
r=[a[0]]
for x in a[1:]:
if not (x in r):
r+=[x]
return r
z=setOf([1,2,3,1,2,3,11,11,22,22])
print(z)
ZGVmIHNldE9mKGEpOgoJcj1bYVswXV0KCWZvciB4IGluIGFbMTpdOgoJCWlmIG5vdCAoeCBpbiByKToKCQkJcis9W3hdCglyZXR1cm4gcgoJCno9c2V0T2YoWzEsMiwzLDEsMiwzLDExLDExLDIyLDIyXSkKcHJpbnQoeikKCQ==