YOU SAID:
歯の妖精は昨夜来ました
INTO JAPANESE
歯の妖精は夜来ました
BACK INTO ENGLISH
The tooth fairy came at night
INTO JAPANESE
歯の妖精が夜にやってきた
BACK INTO ENGLISH
The Tooth Fairy came at night
INTO JAPANESE
歯の妖精は夜に来ました
BACK INTO ENGLISH
The tooth fairy came at night
INTO JAPANESE
歯の妖精が夜にやってきた
BACK INTO ENGLISH
The Tooth Fairy came at night
INTO JAPANESE
歯の妖精は夜に来ました
it is unlikely that this phrase will ever reach equilibrium