King Octopus has servants with six, seven, or eight legs.
The The servants with seven legs always lie, but the servants with either six or
eight eight legs always saytell the truth.
One day, four servants met.
The blue one says: "Altogether, “Altogether, we have $28$ legs";28 legs.”
theThe green one says: "Altogether, “Altogether, we have $27$ legs";27 legs.”
theThe yellow one says: "Altogether, “Altogether, we have $26$ legs";26 legs.”
theThe red one says: "Altogether, “Altogether, we have $25$ legs"25 legs.”
What is the colour of the servant that sayswho tells the truth?