Question: EXIT : E is the first extended play by a South Korean boy group that was originally what?

Context paragraphs:
Blooming Period: Blooming Period is the fifth extended play by South Korean boy group Block B, released on April 11, 2016 by Seven Seasons, almost two years since their last Korean album, "H.E.R".  The album contains two singles, "몇 년 후에 (A Few Years Later)" which was pre-released on March 28, 2016, and "Toy".

17 Carat: 17 Carat is the debut extended play by South Korean boy group Seventeen.  It was released on May 29, 2015 by Pledis Entertainment and distributed by LOEN Entertainment.  "Adore U" serves as the lead single for the extended play.

Awake (KNK EP): Awake (stylized as AWAKE) is the first extended play (EP) by South Korean boy group KNK.  It contains six songs and two instrumental tracks, including the lead single, "Back Again".  All tracks from the EP was personally written, composed and arranged by Kim Tae-joo who also produced hit songs like Beast's "Good Luck", "12:30" and more.

Lightsaber (song): "Lightsaber" is a single recorded by South Korean boy group EXO for their collaboration with "Star Wars."  It was released in Korean version by S.M. Entertainment on November 11, 2015.  The song was announced to be a bonus track for the group's fourth extended play "Sing for You".  It was released in both Korean and Chinese on December 10, 2015 along with the extended play.  The single later was released in Japanese on December 17, 2015 by Avex Trax.

Write.. (EP): Write. .  is the debut extended play by South Korean singer Woohyun.  It was released by Woollim Entertainment on May 9, 2016.  The EP marked the official solo debut of Woohyun, who had been known as a member of South Korean boy group Infinite for nearly six years.

BTS discography: The following is the discography of South Korean boy group BTS.  The group debuted in South Korea on June 2013 with single album, "2 Cool 4 Skool", at number 5 on South Korean Week 31 Gaon Weekly Chart.  They made a comeback on September 2013 with an extended play, "O!RUL8,2? ", which peaked at number 4 on Week 38 Gaon Weekly Chart.  BTS then released their second extended play, "Skool Luv Affair", in February 2014, where it charted at number 1 on Week 18 Gaon Weekly Chart.  This also marked the first time their album charted on international charts, Billboard World Albums and Japan's Oricon Chart, specifically.  A repackaged version of the album, "Skool Luv Affair Special Addition" which was released in May 2014, also peaked at number 1 on Week 21 Gaon Weekly Chart.

Exit : E: EXIT : E is the first extended play, and the second musical release of South Korean group Winner.  It was released on February 1, 2016, 18 months after their debut album 2014 S/S back in 2014.  As with their first album, the members contributed heavily to the songwriting and production aspects of "EXIT : E".  The album was also WINNER's last with member Nam Tae-hyun, who left the group on 25 November 2016.

Unfair (song): "Unfair" is a single recorded by South Korean boy group EXO for their fourth extended play "Sing for You".  It was released in both Korean and Chinese on December 10, 2015 as the second single for the extended play.

Lies (Big Bang song): "Lies" (Hangul: 거짓말 ; RR: "Geojitmal " ) is a song recorded by the South Korean boy band Big Bang.  The song was written and composed by rapper G-Dragon.  It was released on August 16, 2007 by YG Entertainment as the first single from Big Bang's first extended play "Always" (2007).  It became the group's breakout hit, topping charts in their home country for several weeks and consequently winning Song of the Year at the 2007 Mnet Asian Music Awards.  The song remains one of their most critically acclaimed song to date and is often view as one of their signature songs.

Winner (band): Winner (Hangul: 위너), often stylized as WINNER, is a South Korean boy group formed in 2013 by YG Entertainment and debuted in 2014.  It currently consists of four members, Jinwoo, Seunghoon, Mino and Seungyoon.  Originally a five-piece group with Taehyun, who later departed from the group in November 2016.

Supporting paragraphs: Exit : E Winner (band)
Answer: a five-piece group