#!/usr/bin/env python
PATH_OUT = 'out.txt'
PATHD    = "..."
import re
pathds     = re.findall(r'[A-Z][^A-Za-z]+', '%s ' % (PATHD))
outs       = []
x_previous = None
y_previous = None
for (i_pathd, pathd) in enumerate(pathds):
 fields = (re.sub(r'([A-Z]+)', r'\1\t', re.sub(r'[\s,]+', '\t', pathd)).
           split('\t'))
 # print(fields)
 command = fields[0]
 if (fields[1] == '' or fields[2] == ''): ## "Z"
  outs.append(command)
 else:
  x = round(float(fields[1]))
  y = round(float(fields[2]))
  if (i_pathd == 0): ## first point
   outs.append('%s%d,%d' % (command, x, y))
  else:
   x_out   = x - x_previous
   y_out   = y - y_previous
   command = command.lower()
   if (command != 'l' or (x_out != 0 and y_out != 0)):
    outs.append('%s%d,%d' % (command, x_out, y_out))
   else:
    if   (x_out != 0): outs.append('h%d' % (x_out))
    elif (y_out != 0): outs.append('v%d' % (y_out))
    else:              pass ## same point after rounding
  x_previous = x
  y_previous = y
print(len(outs))
f_out = open(PATH_OUT, 'wt')
f_out.write(''.join(outs))
f_out.close()