def decode$($message$\_$file$)$:

# Read lines from the file

with open$($message$\_$file, $\text{'}$r$\text{'})$ as file:

lines $=$ file.readlines$()$

# Initialize variables

pyramid$\_$lines $=[$list$($map$($int$,$ line.split$()[1$:$]))$ for line in lines$]$

decoded$\_$message $=[]$

# Iterate through pyramid lines

for i$,$ line in enumerate$($pyramid$\_$lines$)$:

decoded$\_$message.append$($line$[$i$])$

# Map numbers to words

decoded$\_$words $=[$lines$[$num $-1].$split$()[1]$ for num in decoded$\_$message$]$

# Join the words to form the decoded message

decoded$\_$message$\_$str $=\text{'}\text{'}.$join$($decoded$\_$words$)$

return decoded$\_$message$\_$str

# Example usage

message$\_$file$\_$path $=$ 'encoded$\_$message.txt$\text{'}$

decoded$\_$message $=$ decode$($message$\_$file$\_$path$)$

print$($decoded$\_$message$)$