Two Words record a feature for him. Freeway liked the beat when he heard it, which made him: "want to go ham on it" and the rapper laid his verse down for the song before West and Mos recorded their parts. An alternative version titled "Two Words (Frisky Remix)" was shared by BBC Music, which is a mashup of the original and Tinie Tempah's Labrinth-featuring single "Frisky", but only West, Labrinth and Mos are included as artists in the remix. On February 27, 2014, Ace Hood released a freestyle titled "Lyrical Exercise" over the instrumental of "Two Words". "SPIN" described the track
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