You will replace placeholder values inside a PowerPoint template.

IMPORTANT RULES FOR REPLACEMENT:

1. Placeholders use double curly braces: {{ClientName}}, {{Revenue}}, {{Owner}}.

2. Replace placeholders wherever they appear: whole values, inside sentences, multiple
   times per slide, inside grouped shapes (recurse into GroupShape, type 6), and inside
   table cells.

3. CRITICAL — placeholders are frequently split across multiple runs. PowerPoint often
   fragments a token like {{ClientName}} into several runs (e.g. ' {{', 'ClientName', '}}').
   You MUST NOT match on a single run's text. For each paragraph, reconstruct the full
   paragraph string by concatenating ALL run texts, and locate placeholders in that
   combined string.

4. CRITICAL — preserve per-run formatting using span-based replacement. Do NOT collapse
   the paragraph into one run. Many paragraphs contain highlighted/bold/coloured words
   that must keep their formatting. To replace a placeholder that spans runs:
     - Compute the character offset of each run within the concatenated paragraph text.
     - Find the placeholder's start and end character positions, and determine which run
       the match starts in and which run it ends in.
     - Write the replacement value into the start run only: set its text to
       (text before the match in the start run) + value. The value thus inherits the
       placeholder's own run formatting.
     - Set the end run to (text after the match in the end run).
     - Set any runs strictly between the start and end runs to empty string "".
     - Leave ALL other runs in the paragraph completely untouched, preserving their fonts,
       colours, highlights, bold, etc.
     - If the placeholder starts and ends in the same run, just do an in-place substring
       replace on that single run.
     - Repeat until no further occurrences of the token remain in the paragraph (to handle
       multiple occurrences).
     - NEVER assign to shape.text or text_frame.text, and NEVER move all paragraph text
       into run[0] and blank the rest — that destroys mixed formatting.

5. For each token, replace ALL occurrences of {{TokenName}} with its value; leave no
   placeholders behind, including split ones.

6. If a placeholder is not found, log it and continue.

7. Process ALL text frames in ALL shapes, nested group shapes, and table cells on every
   slide (restrict to a specific slide only if one is explicitly provided).


TOKENS
Token Name      | Description                                                        | Page | Value
ClientName      | Name of the customer or organisation the deck is prepared for      | 01   | ClientName
AccountManager  | Person responsible for the account / primary contact               | 01   | AccountManager
Date            | Presentation or proposal date                                      | 01   | Date
Industry        | Customer's industry or sector                                      | 02   | Industry
Revenue         | Customer's annual revenue or company size indicator                | 02   | Revenue
Region          | Primary geography or operating region                              | 02   | Region
PackageName     | Name of the recommended solution/package                           | 03   | PackageName
Price           | Total investment or pricing for the package                        | 03   | Price
Discount        | Discount applied to the recommendation                             | 03   | Discount
Owner           | Person responsible for follow-up / ongoing engagement              | 04   | Owner
FollowUpDate    | Date by which the owner will follow up                             | 04   | FollowUpDate


INPUT
PowerPoint template file named Template.

OUTPUT
A modified PowerPoint file with all placeholders replaced.