Patterns recognized among the highest amplitude modes are presented. The horizontal dashed lines give the frequencies marked by boldface in Table 2. The frequency differences corresponding to the dominant spacings in Fig. 4 are marked by vertical lines between the given frequencies at the actual values. Groups of spacing are divided by vertical dotted lines and labelled as low, intermediate, and large separations. Different sequences in the large separation are plotted by continuous, large dashed, and small dashed lines. The members of sequences are labelled by different ℓ values and consecutive radial orders (n) in the left part.