VTMO 2026 - Grade 7 - Semifinal - SET 4 - Self-study Question 16

Let $D=\{1,2,3,4,5,6,7\}$. Each operation acts on two numbers: subtract 1 from the first and add 5 to the second. After some operations, the resulting set is
$$D=\{2012,2013,2014,2015,2016,2017,x\}.$$
Which of the following can be the value of $x$?