# your code goes here
def transform_line(line):
    lines = []
    line = next(osrc)
    while line != "":
        if line[0].isdigit():
            print("O")
            line = next(osrc);
            lines.append(line)
        elif line[0] in {"+", "-"}:
            print("U")
            line = next(osrc);
            lines.append(line)
        else:
            break;
    return lines
 
with open("./testStage1.txt", 'r') as osrc:
    osrc.seek(291)
    line = next(osrc);
    line = next(osrc);
    line = next(osrc);
    # lines = transform_line(line)
    print(line);