By the end of 1918, they had compressed the entire opera into three acts, Act 1 in Prague in 1920, Act II on the moon and Act 3 in Prague in 1420.
I slutet av 1918 hade de komprimerat hela operan till tre akter; akt I i Prag 1920, akt II på månen och akt III åter i Prag 1420.