Permutations are also often written in cyclic notation ("cyclic form") so that given the set "M" = {1,2,3,4}, a permutation "g" of "M" with "g"(1) = 2, "g"(2) = 4, "g"(4) = 1 and "g"(3) = 3 will be written as (1,2,4)(3), or more commonly, (1,2,4) since 3 is left unchanged; if the objects are denoted by single letters or digits, commas and spaces can also be dispensed with, and we have a notation such as (124). The permutation written above in 2-line notation would be written in cyclic notation as formula_6