One-Two-GO Airlines One-Two-GO Airlines One Two Go Airlines Co. Ltd () was a low-cost airline based in Don Mueang, Bangkok, Thailand. Its main base was Don Mueang International Airport, Bangkok. Always owned and managed by Orient Thai Airlines and owned by CEO Udom Tantiprasongchai and his wife Nina Tantriprasongchai, the One-Two-GO brand was retired in July 2010, and the aircraft re-branded as Orient Thai Airlines. The airline started operations on 3 December 2003. Following the crash of OG 269 in Phuket, Thailand on September 16, 2007, One-Two-GO was banned from flying in European Union nations due to safety concerns. On April 8,
Square-free word first difference of the Thue–Morse sequence. That is, from the Thue–Morse sequence one forms a new sequence in which each term is the difference of two consecutive terms of the Thue–Morse sequence. The resulting square-free word is Another example found by John Leech is defined recursively over the alphabet {"a, b, c"}. Let formula_1 be any word starting with the letter "a". Define the words formula_2 recursively as follows: the word formula_3 is obtained from formula_4 by replacing each "a" in formula_4 with , each "b" with , and each "c" with . It is possible to check that the