Question: Nissan Pino is an OEM version of what generation of the kei car built by Suzuki?

Context paragraphs:
Mazda Laputa: The Mazda Laputa is Mazda's version of the Suzuki Kei, a kei car.  The Laputa was introduced in 1999 as a sort of SUV/kei car mix.  The Laputa was restyled slightly for 2001 and was retired in 2006.  The Laputa was available with front- or all wheel drive and as a 3-door hatchback or 5-door station wagon.  Both SOHC and DOHC engines were used.

Suzuki Alto: The Suzuki Alto (スズキ・アルト) is a kei car built by Suzuki.  Its selling points have long included a low price and good fuel economy.  The model, currently in its eighth generation, was first introduced in 1979 and has been built in many countries worldwide.  The Alto badge has often been used on different cars in Japan and in export markets, where it is considered a city car.

Autozam Scrum: The Autozam Scrum is a kei class microvan and pickup truck sold exclusively in Japan by Mazda.  Originally part of the company's Autozam marque it was first introduced in June 1989 (DG41, DH41 for 4WD versions).  Mazda still sells the Scrum under its own name.  The Scrum is a re-badged version of the Suzuki Carry and used Suzuki engines.  The first model year had 550 cc Suzuki F5B engines (34 PS or 52 PS with an intercooled turbo) but after only nine months this was replaced by the larger engined DG/DH51 (660 cc, 38 PS or 58 PS ) as the kei car standards were changed that year.

Suzuki Wagon R: The Suzuki Wagon R is a kei car produced by the Japanese manufacturer Suzuki since 1993.  The R in the name stands for Recreation.  It is one of the first cars to use the "tall wagon" or "tall boy" design, in which the car is designed to be unusually tall with a short bonnet and almost vertical hatchback, and sides in order to maximize the cabin space while staying within the kei car dimension restrictions.

Suzuki Cervo: The Suzuki Cervo is a kei car manufactured by Suzuki Motor Corporation.  Introduced in 1976 as the successor to the Suzuki Fronte Coupé, the Cervo name was originally affixed to a kei sports coupe, and then to models derived from the Suzuki Alto.  The nameplate was retired between 1998 and 2006, and again in March 2010, although it may be revived for the Indian market in 2013.

Nissan Pino: The Nissan Pino is a kei car produced by Nissan from 2007-2010, an OEM version of the sixth generation Suzuki Alto.  It is related to the Suzuki Alto and is also available as the Mazda Carol.

Suzuki Cappuccino: The Suzuki Cappuccino is a small 2-door, 2-seater detachable hardtop minicar produced by Suzuki Motor Corporation.  The vehicle was designed to meet Kei car specifications for lower tax and insurance in Japan.  Weighing 725 kg , the Cappuccino is powered by a turbocharged, three-cylinder, 657 cc DOHC engine (just under the 660cc maximum displacement allowed for a Kei car).  Its dimensions also conformed to Kei car regulations on length and width, being 3295 mm long and 1395 mm wide.

Mitsubishi 3G8 engine: The Mitsubishi 3G8 engine is a range of three-cylinder powerplant from Mitsubishi Motors, introduced in the fifth generation of their Mitsubishi Minica "kei car".  In common with other contemporary engines in the class, it could be specified with many advanced technologies despite its diminutive size, including multi-valve cylinder heads and double overhead camshafts.  The top-of-the-line "Dangan ZZ" variant was also the first kei car to benefit from turbocharging.  In 1987 Mitsubishi was the first manufacturer to supercharge a kei vehicle, and in 1989 became the world's first production car to feature five valves per cylinder, ahead of similar developments by Bugatti, Audi, Ferrari and Toyota.

Suzuki Lapin: The Suzuki Lapin is a kei car with a five-door hatchback body, manufactured since 2002 by Suzuki for the Japanese market only, and was also marketed in Japan only by Mazda as Mazda Spiano under an OEM agreement under their Autozam marque until 2008.  It is based on Suzuki's popular Alto kei car.

Suzuki Twin: The Suzuki Twin was a kei car built by Suzuki and sold in Japan from January 22, 2003, until October 2005.  It was available in both hybrid and non-hybrid versions, making it the first hybrid kei car available in Japan.  Under the Japanese test cycle, the standard model was capable of 4.54L/100 km whereas the hybrid variant was capable of 2.93L/100 km.

Supporting paragraphs: Nissan Pino Suzuki Alto
Answer: sixth