A01 — Plain text only
A02 — Plain text with bare URL
A03 — Plain text with multiple URLs
A04 — Plain text with no-scheme URL
A05 — Plain text with email
B01 — Simple paragraph
B02 — Bold / italic / underline
B03 — Semantic equivalents (strong / em)
B04 — Headings (h1–h6)
B05 — Unordered list
B06 — Ordered list
B07 — Nested list
B08 — Simple table
B09 — Table with thead / tbody
B10 — Single image
B11 — Div with span
