abc

#!/usr/bin/env python3

import sys

def merge_files(file_paths):
    if not file_paths:
        print("At least one file path is required.")
        return

    # Read all lines from all files, including the first one
    all_lines = set()
    for file_path in file_paths:
        with open(file_path, 'r') as f:
            all_lines.update(f.read().splitlines())

    # Sort the unique lines
#    sorted_lines = sorted(all_lines)
    sorted_lines = sorted(all_lines, key=str.lower)


    # Write the sorted, unique lines to the first file, overwriting its contents
    with open(file_paths[0], 'w') as f:
        for line in sorted_lines:
            f.write(line + '\n')

    print(f"Merged {len(file_paths)} files into {file_paths[0]}")

if __name__ == "__main__":
    # Get file paths from command line arguments
    file_paths = sys.argv[1:]

    if not file_paths:
        print("Usage: txt-line-merge-abc file1.txt file2.txt file3.txt ...")
    else:
        merge_files(file_paths)