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Question: which better, 85mm 1.8 or 50mm 1.4 ??

I'm a newbie photographer, and from several months ago I really interested with the portrait photography, making the background blur so much. So, I'm still confuse wheter to choose the 85mm 1.8 or 50mm 1.4 ?? i want to shoot a long objects too, when the 50mm 1.4 can't achieve it.thanks