Silhouette coefficient

Suppose we have the cohesion and the separation for 5 random points from a synthetic dataset:

$$a_1 = 0.2,\, b_1 = 0.8 \\ a_2 = 1.1, \, b_2 = 0.4 \\ a_3 = 1.7,\, b_3 = 0.5 \\ a_4 = 0.5,\, b_4 = 1.2\\ a_5 = 1.6,\, b_5 = 1.3\\$$Judging by these scores, which data points could be either assigned to another cluster or misclassified? Enter the indexes of the data points, separated by a space.