12. The following infinite sequence composed of 1s and 2s has an interesting characteristic: starting from the first term, group the terms with the same number, then write down the number of terms in each group in order, and the infinite sequence formed by these numbers is exactly the sequence itself. This sequence is called the Kolakoski sequence. According to this characteristic, continue to write the next 8 terms of this sequence (from the 14th term to the 21st term), if it is known that the sum of the first 50 terms of this sequence is 75, and the 50th term is 2, then the 73rd term, 74th term, 75th term, and 76th term can be known as $\qquad$