14 strokes
black ink, India ink, ink stick, Mexico
On'Yomi: ボク
Kun'Yomi: すみ
13 strokes
tracks, mark, print, impression
On'Yomi: セキ
Kun'Yomi: あと
15 strokes
18 strokes
remains, traces, footprint
On'Yomi: セキ, シャク