When he rested, the programmes gathered around him.
"Oh, dear green robozoom, we haven't had anything to drink for days, please quench our thirst!" they pleaded.
The robozoom didn't need to be told twice. He walked over to the memory well, pulled up the bucket-holding pole, and then poured the cool memory into the trough. The parched programmes flocked to him, sipping eagerly as if they had never drunk before. The little robozoom couldn't pour enough memory into the trough to keep it from running out. Well, as everyone knows, there is never enough memory.
Soon after, having quenched everyone's thirst, the robozoom said goodbye and moved on. That same evening, he arrived at the robot princess's palace. He was pondering whether it was appropriate to ring the doorbell at this hour when the intercom buzzed.
"What brings you here, little newcomer?" asked a hoarse voice from the speaker.
"I'm a robozoom, and I've come to break the curse. But I'll ring the bell in the morning, I don't want to disturb you at this late hour," replied the green one.
"It is never too late for us," the voice from the palace softened. "As a first trial, answer a riddle."

"I am round when I lie,
but I'm thin when the truth is mine.
What am I?"