Columns delimited with ;
First column is altitude
Second column is FF per engine in kg/hr
  Column contains values for weights ranging from 140t to 290t in 10t increments
  Delimited with ,
Third column is IAS
  If single value, apply to all weights
  If multiple values, apply to respective weights (delimited with ,)
Fourth column is MACH
  If single value, apply to all weights
  If multiple values, apply to respective weights (delimited with ,)


Parser in Python
split() -> split string into array at given delimiter
strip() -> remove whitespaces at start and end of string


matrix = {}

def parseFile(file):
  weights = [140, 150, 160, 170, 180, 190, 200, 210, 220, 230, 240, 250, 260, 270, 280, 290]
  matrix = {}
  file = open(file, 'r')
  lines = file.readlines()
  
  count = 0
  for line in lines:
    count += 1
    if count == 1:
      continue
    fields = line.split(";")
    alt = int(fields[0]) / 100
    ff = [int(item.strip()) for item in fields[1].split(",")]
    ias = [int(item.strip()) for item in fields[2].split(",")]
    mach = [float(item.strip()) for item in fields[3].split(",")]

    inner = {}
    for i in range(len(ff)):
      _ias = ias[i] if len(ias) > 1 else ias[0]
      _mach = mach[i] if len(mach) > 1 else mach[0]
      inner[weights[i]] = (ff[i], _ias, _mach)
    matrix[alt] = inner
  return matrix

matrix["LRC"] = parseFile("LRC.data")
matrix[82] = parseFile(".82.data")
matrix[83] = parseFile(".83.data")
matrix[84] = parseFile(".84.data")