YOU SAID:
Thomas the train is a blue nibba
INTO JAPANESE
きかんしゃトーマスは青いニバ
BACK INTO ENGLISH
Thomas Thomas is blue niva
INTO JAPANESE
トーマストーマスは青いニバ
BACK INTO ENGLISH
Thomas Thomas is a blue niva
INTO JAPANESE
トーマストーマスは青いニバです
BACK INTO ENGLISH
Thomas Thomas is blue niva
INTO JAPANESE
トーマストーマスは青いニバ
BACK INTO ENGLISH
Thomas Thomas is a blue niva
INTO JAPANESE
トーマストーマスは青いニバです
it is unlikely that this phrase will ever reach equilibrium