t = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
import os 
dirs = r'E:\group_5\labels_g3_1'
ndirs = r'E:\group_5\labels_3'
for filenames in os.listdir(dirs):
    if filenames.endswith('.txt'):
        old_file = os.path.join(dirs, filenames)
        new_file = os.path.join(ndirs, filenames)
        with open(old_file, 'r') as f:
            lines = f.readlines()
        if len(lines) != 6:
            print(f"File {filenames} does not have exactly 6 lines.")
            continue
        idx = [t.index(c) for c in filenames.split('_')[0]]
        with open(new_file, 'w') as f:
            for i,line in enumerate(lines):
                line = line.split(' ')
                line[0] = str(idx[i])
                f.write(' '.join(line))