Question: In which season of coaching was the longer serving of the two coaches of the 2016 Auburn Tigers football team and 2016 Oklahoma Sooners football team ?  

Context paragraphs:
2005 Auburn Tigers football team: The 2005 Auburn Tigers football team represented Auburn University in the 2005 NCAA Division I-A football season.  Despite having four starters from the 2004 team selected in the first round of 2005 NFL Draft, Auburn finished the season with a 9–3 record, including a 7–1 record in the Southeastern Conference.  The Tigers shared the SEC Western Division championship with LSU, but because the Bayou Bengals defeated Auburn 20–17 in overtime on October 22, the Tigers did not advance to the SEC Championship Game.  Head coach Tommy Tuberville became only the third Tigers coach to lead Auburn to a fourth consecutive win over arch rival Alabama when the Tigers defeated the Crimson Tide 28–18 at Jordan–Hare Stadium on November 19.  Auburn finished the season ranked #14 in both the Coaches Poll and AP Poll, with a #13 consensus ranking.

List of Oklahoma Sooners head baseball coaches: The Oklahoma Sooners baseball program is a college baseball team that represents the University of Oklahoma.  The team has had eight head coaches since organized baseball began 1898 with the nickname "Sooners".  The Sooners have played in more than 3,400 games during its 110 seasons.  In those seasons, five coaches have won conference championships with the Sooners: Bill Owen, Lawrence Haskell, Jack Baer, Enos Semore and Larry Cochell.  Two coaches have won national championships: Baer and Cochell.  Semore is the all-time leader in games coached, years coached and wins.  Owen is the overall leader in winning percentage.  Baer is, in terms of winning percentage, the worst coach the Sooners have had.  Of the eight head coaches, two have received National Coach of the Year honors.  The current head coach is Sunny Golloway who was hired in July 2005.

2006 Auburn Tigers football team: The 2006 Auburn Tigers football team represented Auburn University in the 2006 NCAA Division I FBS football season.  Head coach Tommy Tuberville served his eighth season at Auburn, the third longest tenure among current SEC head coaches that year.  Offensive coordinator Al Borges returned for his third season to direct the offensive and was joined by first-year defensive coordinator Will Muschamp who came from the Miami Dolphins.  Auburn played its eight-game home schedule within the friendly confines of Jordan–Hare Stadium, the ninth largest on-campus stadium in the NCAA seating 87,451.  The Tigers finished the season with an impressive 11–2 record, finishing second in the SEC Western Division behind the surprising Arkansas Razorbacks.  With signature wins over the eventual BCS champion Florida Gators and the final-ranked #3 LSU Tigers, Auburn was the only team that could claim victories over two BCS and top five teams.  However, the team also had signature losses to the unranked Arkansas Razorbacks and Georgia Bulldogs.  They finished the season ranked #8 in the Coaches Poll and #9 in the AP Poll.

2016 Auburn Tigers football team: The 2016 Auburn Tigers football team represented Auburn University in the 2016 NCAA Division I FBS football season.  The Tigers played their home games at Jordan–Hare Stadium in Auburn, Alabama and competed in the Western Division of the Southeastern Conference (SEC).  They were led by fourth-year head coach Gus Malzahn.  They finished the season 8–5, 5–3 in SEC play to finish in a tie for second place in the Western Division.  They were invited to the Sugar Bowl where they lost to Oklahoma.

2004 Auburn Tigers football team: The 2004 Auburn Tigers football team represented Auburn University in the 2004 NCAA Division I-A football season.  Auburn compiled a record of 13–0, winning the Southeastern Conference championship and finishing the season ranked #2 in both the AP Poll and the Coaches' Poll.  Beginning the season ranked #17 in the AP poll and #18 in the Coaches' Poll, the Tigers were denied a berth in the BCS National Championship Game because they finished the regular season ranked #3 in the BCS rankings.  Head coach Tommy Tuberville, who was nearly fired after the 2003 season, was named national Coach of the Year by the Associated Press.  This was Auburn's third undefeated season in which they played over ten games.

2016 Oklahoma Sooners football team: The 2016 Oklahoma Sooners football team represented the University of Oklahoma in the 2016 NCAA Division I FBS football season, the 122nd season of Sooner football.  The team was led by two-time Walter Camp Coach of the Year Award winner, Bob Stoops, in his 18th season as head coach.  They played their home games at Gaylord Family Oklahoma Memorial Stadium in Norman, Oklahoma.  They are a charter member of the Big 12 Conference.

2002 Auburn Tigers football team: The 2002 Auburn Tigers football team represented Auburn University in the 2002 NCAA Division I-A football season.  Auburn, led by head coach Tommy Tuberville, finished with record of 9–4, including a 5–3 record in the Southeastern Conference.  Following a disappointing 7–5 finish the previous season, the coaching staff of the 2002 Tigers featured two prominent new members.  Bobby Petrino was hired as the new offensive coordinator, and Gene Chizik joined the staff as the Tigers' new defensive coordinator.  Petrino left following the season to assume the head coaching job at Louisville, while Chizik remained at Auburn through the 2004 season before leaving for the defensive coordinator position at Texas.  The Tigers finished the season ranked #14 in the AP Poll and #16 in the Coaches Poll.

2007 Auburn Tigers football team: The 2007 Auburn Tigers football team represented Auburn University during the 2007 NCAA Division I FBS football season.  Head coach Tommy Tuberville returned for his ninth season at Auburn, the third longest tenure among SEC head coaches in 2007.  He was joined by returning offensive coordinator Al Borges and returning defensive coordinator Will Muschamp.  Auburn played its eight-game home schedule at Jordan–Hare Stadium, the ninth largest on-campus stadium in the NCAA in 2007, seating 87,451.  Conference foe Vanderbilt returned to the schedule while non-conference opponents South Florida and Tennessee Tech played the Tigers for the first time.  The Tigers finished the season ranked #14 in the Coaches Poll and #15 in the AP Poll.

1993 Auburn Tigers football team: The 1993 Auburn Tigers football team represented Auburn University in the 1993 NCAA Division I-A football season.  Under first-year head coach Terry Bowden, the team went undefeated with a record of 11–0 and finished #4 in the AP Poll.  Due to NCAA probation, Auburn was banned from TV and post-season play, and suffered reduced scholarships.  The post-season ban prevented Auburn from playing the SEC Championship and a bowl game.  Nonetheless, Auburn was the only major college football team to finish the season undefeated.  The National Champions Foundation recognized Auburn as one of its 1993 national champions, however Auburn University only formally recognizes championships for the 1957 Auburn Tigers football team and 2010 Auburn Tigers football team seasons, although the official website for Auburn athletics does highlight the 1993 team.

1976 Auburn Tigers football team: The 1976 Auburn Tigers football team represented Auburn University in the 1976 NCAA Division I football season.  At the end of the 1975 season, Ralph "Shug" Jordan retired after 25 years as head coach of the Auburn Tigers.  Doug Barfield, Jordan’s offensive coordinator, took over as head coach starting in 1976.  He coached the Tigers to a 3–8 record his first season, winning just 2 of 6 conference games.  However, Mississippi State was forced to forfeit their game that year, so Auburn's record officially improved to 4–7 (3–3)."'

Supporting paragraphs: 2016 Auburn Tigers football team 2016 Oklahoma Sooners football team
Answer: 18th season