Lucy wanted to surprise her dad by making a sandwich. She gathered bread, cheese, and ham.

Lucy's dad, a software engineer, entered the kitchen. 'Are you following the code for the perfect sandwich?' he asked.

Lucy nodded confidently. 'I’m using the sandwich-making algorithm you explained,' she assured.

She followed the steps: bread, cheese, ham, bread. But forgot to add a crucial step: 'Eat before serving.'

Dad tasted the sandwich. 'It’s missing a step – the taste test! Always listen carefully, Lucy,' he advised.

Lucy nodded, realizing she should have followed the complete algorithm, including the 'taste test' step.

While Dad explained, Lucy altered the 'sandwich-making algorithm' and noted each step carefully.

The new steps were: bread, cheese, ham, taste test, bread, serve. Lucy thanked Dad and made a perfect sandwich.

Lucy’s dad emphasized, 'When coding or making sandwiches, listen, think, and follow each step carefully.'

Their failure turned into a lesson. From then on, Lucy and her dad always coded the best sandwiches together.