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Add $6$ and $13($Ignore $5$th carry bit$).$

$\backslash$table$[[,0,0,0,0,$Carry bits$],[,0,1,1,0,4-$bit number$],[+,1,1,0,1,4-$bit number$],[,0,0,0,0,$Result number$],[,2,,,4,5]]$