Reng v.3.2, 9 bytes (self-answer, non-competing)

ii¤ææö±2. 

Takes two inputs (a b) and outputs b a. Try it here!

Reng v.3.2, 9 bytes (self-answer, non-competing)

ii¤ææö±2. 

Takes two inputs (a b) and outputs b a. Try it here!

i takes input twice, ¤ duplicates the stack, æ prints a number and a space (and does so twice, there being two), ö prints a newline, ± does what you might expect, and 2. skips the next two characters, wrapping around the input getting characters.

Reng v.3.2, 9 bytes

ii¤ææö±2. 

Takes two inputs (a b) and outputs b a. Try it here!

Reng v.3.2, 9 bytes (self-answer, non-competing)

ii¤ææö±2. 

Takes two inputs (a b) and outputs b a. Try it here!