#!/usr/bin/env python3
import json
import sys

MAX_INLINE_WIDTH = 80
INDENT = 2

def try_inline(obj):
    try:
        s = json.dumps(obj, separators=(",", ": "))
        if len(s) <= MAX_INLINE_WIDTH and not isinstance(obj, (dict, list)) or not obj:
            return s
        # allow inline small dicts/arrays without nesting
        if isinstance(obj, dict) and all(not isinstance(v, (dict, list)) for v in obj.values()):
            return s if len(s) <= MAX_INLINE_WIDTH else None
        if isinstance(obj, list) and all(not isinstance(v, (dict, list)) for v in obj):
            return s if len(s) <= MAX_INLINE_WIDTH else None
    except Exception:
        pass
    return None

def format_json(obj, level=0):
    inline = try_inline(obj)
    if inline is not None:
        return inline

    pad = ' ' * (level * INDENT)
    next_pad = ' ' * ((level + 1) * INDENT)

    if isinstance(obj, dict):
        items = []
        for k, v in obj.items():
            val = format_json(v, level + 1)
            items.append(f'{next_pad}"{k}": {val}')
        return "{\n" + ",\n".join(items) + f"\n{pad}}}"
    elif isinstance(obj, list):
        items = [format_json(v, level + 1) for v in obj]
        return "[\n" + ",\n".join(f"{next_pad}{v}" for v in items) + f"\n{pad}]"
    else:
        return json.dumps(obj)

def main():
    obj = json.load(sys.stdin)
    print(format_json(obj))

if __name__ == "__main__":
    main()