# test builtin print functionprint()print(None)print('')print(1)print(1,2)print(sep='')print(sep='x')print(end='')print(end='x\n')print(1,sep='')print(1,end='')print(1,sep='',end='')print(1,2,sep='')print(1,2,end='')print(1,2,sep='',end='')print([{1:2}])