Task: Sequential_Recommendation

system
You are a helpful assistant. The assistant first thinks about the reasoning process in the mind by using Belief-Desire-Intention (BDI) framework and then provides the user with the answer. The reasoning process and answer are enclosed within <think> </think> and <answer> </answer> tags, respectively. 
Below is an instruction that describes a task. After thinking, when you finally reach a conclusion based on the customer's intention, desire and belief, clearly state the BDI thinking process within <think> </think> and then the answer within <answer> </answer> tags.


user 
Instruction: Based on the user's historical purchases, rank the items in options and predict the next product of the user's interest from the provided options.

Input:
Purchase History:
1st: RumbleRoller - Textured Muscle Foam Roller Manipulates Soft Tissue Like A Massage Therapist. Sports & Outdoors. Sports & Fitness. RumbleRoller.
2nd: RKS Kettlebell Workout. Sports & Outdoors. Sports & Fitness. Reinhardt Kettlebell System.
3rd: Victorinox Swiss Army Cadet Knife. Sports & Outdoors. Outdoor Recreation. Victorinox.
4th: 32oz Smoky Mountain Growler TM. Sports & Outdoors. Sports & Fitness. Smoky Mountain Growlers.
5th: Fit Four The F4X Spartan - Full Leather Palm Callus Guard WOD Workout Gloves for Weight Lifting & Cross Training Athletes. Sports & Outdoors. Sports...
6th: WODSuperStore Resistance Band for Legs & Butt - Hip Booty Circle Bands to Tone Glute, Thighs & Hips. Sports & Outdoors. Sports & Fitness. WODSuperStore.
7th: Quick Drying Microfiber Compact Sport Towel. 40"x20" For Exercise, Gym, Sport, Yoga, Travel, Camping, Hiking (2 or 1 packs). Sports & Outdoors. Sports & Fitness...
8th: PhysioPhit Muscle Foam Roller – High Density, Trigger Point Grid Provides Maximum Pain Relief, Fastest Workout Recovery & Deep Massage for Sore Muscles, Extra Firm...
9th: KME Precision Knife Sharpener System with 4 Gold Series Diamond Hones - Base Included. Sports & Outdoors. Sports & Fitness. KME Sharpeners.

Options:
A: 130DB Emergency Personal Safety Alarm Keychain,Self Defense Electronic Security Whistle Keyring Ornament,Azan alarm,Japanese Lovely Doll Shaped Security Siren song voice Scream Safe Protection Alarm. Electronics...
B: Hamilton Beach Flip Belgian Waffle Maker with Removable Plates (26030). Home & Kitchen. Kitchen & Dining. Hamilton Beach.
C: SiPix StyleCam Blink Digital Camera. Electronics. Camera & Photo. SiPix.
D: MSI Micro ATX DDR3 2133 NA Motherboards A68HM-E33. Electronics. Computers & Accessories. MSI.
E: HP 2133-KX868AT 8.9-Inch Netbook - 3 Cell Battery. Electronics. Computers & Accessories. HP.
F: adidas Performance Women's Ultimate Regular Fit Fleece Pants. Sports & Outdoors. Sports & Fitness. adidas.
G: Tabeo 7 Inch Kids Tablet. Electronics. Computers & Accessories. Tabeo.
H: Kurt Adler Candy Cane Set of 12 Ornament Set, 12 Piece. Home & Kitchen. Seasonal Dcor. Kurt Adler.
I: Sanyo HPS-SG4 Extra-Large Indoor Barbecue Grill and Griddle. Home & Kitchen. Kitchen & Dining. Sanyo.
J: Vredestein Fortezza Senso All Weather - 700x23mm. Sports & Outdoors. Outdoor Recreation. Vredestein.
K: Philips SWW1890/27 Wireless HD Net Connect. Electronics. Computers & Accessories. Philips.
L: Logitech QuickCam Communicate Deluxe (Black). Electronics. Computers & Accessories. Logitech.
M: GROSCHE BALI Hand-Made Glass Water Infuser & Water Pitcher with Stainless Steel Filter Lid, 1500 ml. Home & Kitchen. Kitchen & Dining. GROSCHE.
N: Westcott Illuminator Reflector Arm (With Carry Case) Black. Electronics. Camera & Photo. Westcott.
O: Chef'n Twist Handheld Spiralizer Vegetable Slicer, Green. Home & Kitchen. Kitchen & Dining. Chef'n.
P: Zach & Dani's Gourmet Coffee Roaster. Home & Kitchen. Kitchen & Dining. Zach & Dani's.
Q: Bushnell Banner Dusk & Dawn Multi-X Reticle Riflescope with 3.3-Inch Eye Relief, 3-9X 40mm. Sports & Outdoors. Sports & Fitness. Bushnell.
R: SKLZ Core Wheels Dynamic Strength & Ab Trainer. Sports & Outdoors. Sports & Fitness. SKLZ.
S: Discraft Elite Z Heat Distance Driver - Colors may vary. Sports & Outdoors. Sports & Fitness. Discraft.
T: Egret Baits Vudu Mullet. Sports & Outdoors. Sports & Fitness. Egret Baits.


assistant
Answer: R