import pandas as pd


def correct_labels(input_file, output_file):
    df = pd.read_csv(input_file, sep="\t", names=["Text"])

    corrected_lines = []

    for line in df["Text"]:
        tokens = line.split(" ")
        corrected_tokens = []
        previous_token = "O"

        for token in tokens:
            if (
                token == "I-ORG"
                and previous_token != "B-ORG"
                and previous_token != "I-ORG"
            ):
                corrected_tokens.append("B-ORG")
            elif (
                token == "I-PER"
                and previous_token != "B-PER"
                and previous_token != "I-PER"
            ):
                corrected_tokens.append("B-PER")
            elif (
                token == "I-LOC"
                and previous_token != "B-LOC"
                and previous_token != "I-LOC"
            ):
                corrected_tokens.append("B-LOC")
            elif (
                token == "I-MISC"
                and previous_token != "B-MISC"
                and previous_token != "I-MISC"
            ):
                corrected_tokens.append("B-MISC")
            else:
                corrected_tokens.append(token)

            previous_token = token

        corrected_line = " ".join(corrected_tokens)
        corrected_lines.append(corrected_line)

    df["Text"] = corrected_lines
    df.to_csv(output_file, sep="\t", index=False, header=False)


input_file = "test-A/out.tsv"
output_file = "test-A/out.tsv"
correct_labels(input_file, output_file)


input_file = "dev-0/out.tsv"
output_file = "dev-0/out.tsv"
correct_labels(input_file, output_file)