import sys

def split_columns(input_file):
    columns = []

    with open(input_file, 'r') as f:
        for line in f:
            parts = line.strip().split(',')
            for i, part in enumerate(parts):
                if len(columns) <= i:
                    columns.append([])
                columns[i].append(part)

    for i, column in enumerate(columns):
        with open(f"{input_file[:-4]}_column_{i + 1}.txt", 'w') as outfile:
            outfile.write("\n".join(column) + "\n")

if __name__ == "__main__":
    for input_file in sys.argv[1:]:
        split_columns(input_file)