A yeekee lotto is a multiple bet containing four selections from different events, like Lucky 15 but without the ability to stake different amounts on different multiples; you must instead stake equal amounts on doubles, trebles and fourfolds.
If you have confidence in all four selections, including a Yankee bet may be beneficial; however, keep in mind that should one leg lose, several combinations could become useless and that cost of placing each bet will quickly add up. See the table below to determine what combinations would remain after one leg loses.