#!/bin/env python

import textwrap
import sys

# with open(sys.argv[1], 'r') as f:
#     lines = f.read().splitlines()
    # print(lines)

# first pass: reflow paragraphs
# paragraph = []
# lines = []
# for line in sys.stdin:
#     line = line.rstrip()
#     if line:
#         paragraph.append(line)
#     else:
#         if paragraph:
#             lines.append(' '.join(paragraph))
#         lines.append("\n")
# if paragraph:
#     lines.append(' '.join(paragraph))
    

skipping = False
in_par = False
running = True
while running:
    line = sys.stdin.readline()
    if line == '':
        running = False
    if line.startswith(">"):
        # ignore quoted line
        print(line, end = "")
    elif line.startswith("```"):
        # ignore code block
        skipping = not skipping
        print(line, end = "")
    elif line.startswith("--"):
        skipping = True
        print(line, end = "")
    elif not line.rstrip():
        # Empty line
        in_par = not in_par
        print()
        print("printing empty line")
        # print(line, end="")
    else:
        if not skipping and in_par:
            par = []
            while True:
                next_line = sys.stdin.readline()
                # if not line.startswith((">", "```", "--")):
                stripped = next_line.rstrip()
                # print(next_line)
                # print("runs")
                if stripped:
                    # print("runs strip")
                    par.append(stripped)
                else:
                    in_par = False
                    print("breaking par")
                    # par.append("\n")
                    break
            line = " ".join(par)
            # print(par)
        # empty line, treat next section as paragraph
        # TODO: fix signature being mangled and newlines erased
        if not skipping:
            wrapped = textwrap.wrap(line, width=74, break_long_words=False, replace_whitespace=True)
            print("\n".join(wrapped), end="")
        else:
            print(line, end = "")