14.2. Cobblestone

Richard was brought to a construction site, where some workers were building a big house. Richard observed the workers for a few minutes to understand what they were doing. Then he followed them, he picked mortar from a pile with a shovel, he set the mortar on top of the stones already set, and returned the shovel. Then, he went to their pile, picked a stone, carried it and set above the mortar. This process took five minutes, and seeing the stone set, he wiped the sweat of his brow, proud of his work. His supervisor saw the work and said:
- "Good job Richard, that's how you do it!" - then slapped Richard's shoulder - "One hundred more stones and you will be done for the day!" - the supervisor left, smiling. Richard simply looked at the stone pile, then at the stone wall and back. He screamed, but no sound came out of his mouth.