^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ chronyd\[[[:digit:]]{1,5}\]: Source [[:digit:].]{7,15} (on|off)line$
^\w{3} [ :[:digit:]]{11} [._[:alnum:]-]+ chronyd\[[[:digit:]]{1,5}\]: Selected source [[:digit:].]{7,15}$