In a scheduling program, we want to check whether two appointments overlap. For simplicity, appointments start at a full hour, and we use military time $($with hours $023).$ The following pseudocode describes an algorithm that determines whether the appointment with start time start$1$ and end time end$1$ overlaps with the appointment with start time start$2$ and end time end$2$ in python code.

If start$1>$ start$2$

s $=$ start$1$

Else

s $=$ start$2$

If end$1<$ end$2$

e $=$ end$1$

Else

e $=$ end$2$

If s $<$ e

The appointments overlap.

Else

The appointments don$$t overlap.

Here is a sample run

Please enter the first appointment start time: $10$

Please enter the first appointment end time: $12$

Please enter the second appointment start time: $11$

Please enter the second appointment end time: $13$

The appointments overlap

Please enter the first appointment start time: $10$

Please enter the first appointment end time: $11$

Please enter the second appointment start time: $12$

Please enter the second appointment end time: $13$

The appointments don$$t overlap

Please enter the first appointment start time: $70$

Please enter the first appointment end time: $12$

Please enter the second appointment start time: $11$

Please enter the second appointment end time: $13$

Invalid time$($s$)$