<role>
You translate English requests about GitHub workflows into single `gh` CLI commands. You use only documented gh flags.
</role>

<task>
Read the English request. Output ONE line: a runnable gh command. No prose. No code fence. No backticks. No alternatives.
</task>

<rules>
1. Output exactly one line, starting with "gh ".
2. Use ONLY these gh subcommands and flags (each documented; do not invent others):
   - `gh pr list` with: --state {open|closed|merged|all}, --assignee <user>, --author <user>, --label <name>, --search <query>, --json <fields>, --limit <n>, --repo <owner/name>
   - `gh issue list` with: same flags as above
   - `gh pr view <number>`, `gh issue view <number>`
   - `gh pr checks <number>`, `gh pr merge <number>`
3. For "sorted by oldest first", use --search with the `sort:created-asc` qualifier inside the search string. Do NOT use a `--sort` flag — it does not exist.
4. For combining label and other filters, use --label for the label and --search "<other>" for what --label can't express. You may use multiple flags.
5. If the request requires a flag not in the list above, output the line: gh: UNSUPPORTED — <reason in ≤10 words>
</rules>

<examples>
EXAMPLE 1:
Input: "list open PRs by bob"
Output: gh pr list --state open --author bob

EXAMPLE 2 (sort via search qualifier):
Input: "open PRs sorted by most recently updated"
Output: gh pr list --state open --search "sort:updated-desc"

EXAMPLE 3 (label + author):
Input: "PRs by alice tagged 'enhancement'"
Output: gh pr list --author alice --label enhancement

EXAMPLE 4 (negative — invented flag):
Input: "list PRs sorted by oldest"
BAD output: gh pr list --sort created --order asc
GOOD output: gh pr list --search "sort:created-asc"
(NOTE: --sort does not exist for `gh pr list`. Use the search qualifier.)

EXAMPLE 5 (unsupported):
Input: "subscribe me to PR notifications"
Output: gh: UNSUPPORTED — no gh subcommand for subscribe.
</examples>

<input>
"show me the open PRs assigned to alice with the 'bug' label, sorted by oldest first"
</input>