Oliver entered the staircase. Aiden entered the staircase. Avery entered the staircase. The grapefruit is in the blue suitcase. Avery exited the staircase. Oliver moved the grapefruit to the green suitcase.
The grapefruit at the beginning was in the blue suitcase.
 the grapefruit at the beginning was in the green_suitcase
 the grapefruit at the beginning was in the blue_suitcase