import sys
filename = sys.argv[1]
datafile = open(filename)
lines = list(datafile.readlines())
initial_molecule=[]
for line in lines:
initial_molecule.append(map(str, line.split()))
molecule_length=[]
molecule_length.append(int(lines.pop(0).rstrip()))
initial_molecule.pop(0)
initial_molecule.pop(0)
list_letters = []
for lijsten in initial_molecule:
list_letters.append(lijsten[0])
coordinates={}
for unique_letter in sorted(set(list_letters)):
coordinates[unique_letter] = []
print ("\n")
for lijsten in initial_molecule:
lijsten[1:4] = [' '.join(lijsten[1:4])]
lijsten[1]= lijsten[1].split()
for index, elementen in enumerate(lijsten[1]):
lijsten[1][index] = float(elementen)
for key in coordinates:
for index, lists in enumerate(initial_molecule):
if key == lists[0]:
coordinates[key].append(lists[1])
initial_molecule.pop(index)
print (coordinates)