Agents are nouns; these are the verbs

Background

The whole system is five verbs. The agents are the nouns that perform them:

Component	Verb
Planner	decompose
Executor	execute
Synthesizer	combine
Critic	check
Orchestrator	retry

Problem statement

Implement pipeline_verb(component) returning the verb a component performs.

Input

• component — one of "planner", "executor", "synthesizer" (or "synthesiser"), "critic", "orchestrator".

Output

Returns the verb: "decompose", "execute", "combine", "check", or "retry".

Examples

Input:  "planner"        Output: "decompose"
Input:  "critic"         Output: "check"
Input:  "orchestrator"   Output: "retry"

Constraints

• Map each component to its verb (accept both synthesizer/synthesiser).

Notes

• Strip away the nouns and every run is the same five verbs — that's the entire control flow.