import copy
import sys

import CommonMark_bkrs as CommonMark

text = sys.stdin.read()
parser = CommonMark.DocParser()
s = parser.parse(text)

print(CommonMark.ASTtoJSON(s))
sys.exit(0)

def is_code_block(o):
    prefix = "```fable\n"
    return o.t == 'IndentedCode' and o.string_content.startswith(prefix)

def is_heading(o):
    return o.t =='ATXHeader'

def walk(o):
    if is_code_block(o):
        yield {
            'type': 'fable',
            'text': copy.deepcopy(o.strings),
        }
    elif is_heading(o):
        yield {
            'type': 'heading',
            'level': o.level,
            'text': copy.deepcopy(o.strings),
        }
    for c in o.children:
        for oo in walk(c):
            yield oo

for o in walk(s):
    print(o)