A survey was conducted on which brand of cell phone each respondent owns. The options included Alpha, Beta, Gamma, Delta, Epsilon, Zeta, and Mu. The cell phones owned by a sample of 20 respondents are shown below.

Mu, Moo, Beta, Alpha, Epsilon, Gamma, Beta,, Mu, Gamma, Epslion, Delta, Beta, Zeta, MU, Beta, Mu, Mu, Beat, Beta

Clean these data and identify any irregularities in the data. Determine the values in the data that contain irregularities. Select all that apply.
A. The sixth value
B. The nineteenth value
C. The fifth value
D. The thirteenth value
E. The second value
F. The third value
G. The eleventh value
H. The fifteenth value