q = ["Ivan", "Petro", "Marko"]
q.push("Taras")
q.push("Oleg")
print("#{q}\n")  # ["Ivan", "Petro", "Marko","Taras","Oleg"]
q.delete_at(0)
print("#{q}\n")  # ["Petro", "Marko","Taras","Oleg"]
q.delete_at(0)
print("#{q}\n")  # ["Marko","Taras","Oleg"]
q.delete_at(0)
print("#{q}\n")  # ["Taras","Oleg"]
q.delete_at(0)
print("#{q}\n")  # ["Oleg"]
q.delete_at(0)
print("#{q}\n")  # []