John, Jenita, Maria and Julie went to a shop. Each picked a colorful ball of a different favorite color. The colors are Yellow, Violet, Green and Red. John and Maria both do not like violet. The person who likes red is a girl. Jenita likes green, but it is not her favorite color. Jenita's favorite color is either green or yellow, although she can have only one favorite color. John likes red, but it is not his favorite color.
Jenita's color should be yellow. John's color cannot be violet and red, it might be yellow or green. As Jenita's color is yellow, so John's color will be green. Maria's do not like violet, so her color must be Red. Then Julie's color is violet.