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symbolic lot_E; {[k_w,l_w] -> [k_r,l_r] : 1 <= k_r <= 12 and 1 <= l_r <= lot_E and 2k_r+96l_r = 12+2k_w+96l_w and 1 <= k_w <= 3 and 1 <= l_w <= lot_E};