An environmental monitoring station processes telemetry packets using pseudocode. The following variables are initialized:

station ← 'KSEA_Seattle'
sensor ← 'Temp_Probe_02'
reading ← '-12.4'

The programmer uses the function SUBSTRING(start, length, string) which extracts a substring starting at the 0-indexed position start with the specified length.

What is the exact value of the variable packet after executing the following statement?

packet ← SUBSTRING(5, 7, station) + SUBSTRING(0, 4, sensor) + reading