He discreetly swapped my wallet.

We conduct group activities at school.

He kept running without looking back at the road.

He attacked the enemy using a flamethrower.

This system enables real-time operation.

We will start the meeting at 3 p.m. Central European Time.

We plan to hold the meeting in Western European Time.

I will start the meeting at 9 a.m. Eastern European Time.

The time complexity of this algorithm is O(n).

He was awarded a medal from the country for his achievements.