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: The user's purchase history implies her preferences. Rank the items in the options based on the user's preferences. Output the item that the user is most likely to purchase next from the options.

Input:
Purchase History:
1st: CRANKBROTHERs Crank Brothers Power Alloy Bicycle Pump. Sports & Outdoors. Outdoor Recreation. CRANKBROTHERs.
2nd: Park Tool Cyclone Chain Scrubber. Sports & Outdoors. Outdoor Recreation. Park Tool.
3rd: Continental Bike Tube (26"/27.5"/29"/700). Sports & Outdoors. Outdoor Recreation. Continental.
4th: KMC Missing Link (10-Speed Cd/6). Sports & Outdoors. Outdoor Recreation. KMCA0.
5th: Portland Design Works Magic Flute Mini Pump with Carrier. Sports & Outdoors. Outdoor Recreation. Portland Design Works.
6th: Pedro's Tire Levers. Sports & Outdoors. Outdoor Recreation. Pedro's.
7th: ESI Chunky MTB Grip. Sports & Outdoors. Outdoor Recreation. ESI Grips.
8th: BV Bicycle Strap-On Bike Saddle Bag/Seat Bag/Cycling Bag. Sports & Outdoors. Outdoor Recreation. BV.
9th: 16g CO2 Threaded cartridges.  16g CO2 Threaded.
10th: Generic Bicycle Bike Tire Tube Repair Kit (48 Bike Tire Rubber Patches With One Rubber Patch Cement).  Generic.
11th: Cannondale Men's Liner Shorts. Sports & Outdoors. Outdoor Recreation. Cannondale.
12th: Stans-No Tubes 35mm Presta Universal Valve Stem (Carded Pair for Mountain). Sports & Outdoors. Outdoor Recreation. Stans-No Tubes.
13th: ESI Grips Extra Chunky MTB Grip. Sports & Outdoors. Outdoor Recreation. ESI Grips.
14th: Portland Design Works Shiny Object CO2 Inflator with Leather Sleeve and Cartridge. Sports & Outdoors. Outdoor Recreation. Portland Design Works.
15th: Park Tool MLP- 1.2 Chain Plier. Sports & Outdoors. Outdoor Recreation. Park Tool.
16th: Cosmos® High-Performance Mesh Dew Rag Cooling Skull Cap for Riding/Skiing/Motorcycling/Trekking/Mountain climbing or Other Sport Activities. Sports & Outdoors. Outdoor Recreation. Cosmos.
17th: Ritchey 5Nm Multi-Torque Key. Sports & Outdoors. Outdoor Recreation. Ritchey.
18th: Meiser Accu-Gage Fat Bike Presta Valve Low Pressure Bicycle Tire Gauge. Sports & Outdoors. Outdoor Recreation. Meiser.
19th: Sunrise Bike 1 Set of Full Carbon Headset Spacer 1-1/8" 20-15-10-5mm. Sports & Outdoors. Outdoor Recreation. SunRise.
20th: Goggle Pocket Ski Pass Holder. Sports & Outdoors. Outdoor Recreation. Goggle Pocket.
21st: CyclingDeal Threaded CO2 Cartridges Refills for Bike Bicycle Pump Inflator, 30 x 16g. Sports & Outdoors. Outdoor Recreation. CyclingDeal.
22nd: prAna Stretch Zion Short. Sports & Outdoors. Outdoor Recreation. prAna.
23rd: Bright Eyes Fully Waterproof 1600 Lumen Rechargeable Mountain, Road Bike Headlight, 6400mAh Battery (Now 5+ Hours on Bright Beam). Comes w/Free Diffuser Lens and Free...

Options:
A: Rocketfish 9' In-Wall High Speed HDMI cable with Ethernet RF-G1168. Electronics. Accessories & Supplies. Rocketfish.
B: Zenith Products 2600HB Make-A-Space Wire Shower Caddy, Bronze. Home & Kitchen. Bath. ZPC Zenith Products Corporation.
C: Belkin Bi-Fold Folio for the Apple iPad with Retina Display (4th Generation) & iPad 3 (Black). Electronics. Computers & Accessories. Belkin.
D: Lipper International 1118 Acacia Wood 18" Lazy Susan Kitchen Turntable. Home & Kitchen. Kitchen & Dining. Lipper International.
E: Oliver&Smith - Instant read Digital Meat Thermometer – Grilling?..has LONGER PROBE - WATER RESISTANT- Shipped from USA – Easy see BIG DISPLAY – be a...
F: Outslayer Double End Heavy Bag Anchor. Sports & Outdoors. Sports & Fitness. Outslayer.
G: SF Cable, 2ft 16 AWG Outlet Saver Power Extension Cord (NEMA 5-15R to NEMA 5-15P). Electronics. Accessories & Supplies. SF Cable.
H: Schwinn Deluxe Cruiser Bicycle Seat.  Schwinn.
I: Center Pinch Lens Cap for CANON EOS 18-55mm Digital Rebel Camera Lens Replacement. Electronics. Camera & Photo. The Camera Hunter.
J: AMC The Walking Dead - Daryl Dixon Ornament 2015 Hallmark. Home & Kitchen. Home Dcor. Hallmark.
K: ADATA 32GB Class 6 SDHC Flash Memory Card ASDH32GCL6-R. Electronics. Computers & Accessories. ADATA.
L: Ruger Tucson Women's Handgun Case. Sports & Outdoors. Sports & Fitness.
M: UniquExceptional MA30RcR Motion Detector Alarm with Rolling Code Remote Control (White). Electronics. Camera & Photo. UniquExceptional.
N: Speedo Adult Adventure Mask Snorkel Fin Set. Sports & Outdoors. Outdoor Recreation. Speedo.
O: Vitamix TurboBlend Two Speed Blender, Black. Home & Kitchen. Kitchen & Dining. Vitamix.
P: Li-lon Battery for Sony NP-BK1. Electronics. Camera & Photo. eForCity.
Q: Yoga Girl Art Design Full Color - 5" Vinyl Decal for Car, Macbook, or Other Laptop. Electronics. Computers & Accessories. Milk Mug Designs.
R: CamelBak Chute 1.5L Water Bottle. Sports & Outdoors. Sports & Fitness. CamelBak.
S: In-Ear Beats Earphone White Carrying Case for Dr.Dre, iBeats, Tour, Heart Beats by Lady Gaga, Diddy Beats, Power Beats, Gratitude, DNA, Diesel VEKTR, iSport Victory,...
T: Personalized Monogrammed Engraved Wine Glasses SET OF 2 (m8). Home & Kitchen. Kitchen & Dining.


assistant
Answer: R