phase unphased
participant unphased:actor#3 "seed" steps=ask#1
participant unphased:actor#1 "alpha" steps=ask#2~actor#1,ask#3
participant unphased:actor#2 "beta" steps=ask#2~actor#2
handoff unphased:actor#3 -> unphased:actor#1 types="string"
handoff unphased:actor#3 -> unphased:actor#2 types="string"
