There are 40 observations in a population. A sample of 4 observations are to be selected randomly using a table of random numbers. Here are the the random numbers obtained from the table of random numbers: 55, 34, 67, 89, 12, 23, 89, 78, 18, 99, 92, 16, 45, and 10. In which random number the selection of the sample should be finished?