def get_differential_var_str(text):
    for i in range(1, len(text)):
        c = text[i]
        if (not ((c == ' ') or (c == '\r') or (c == '\n') or (c == '\t'))):
            idx = i
            break
    text = text[idx:]
    if (text[0] == '\\'):
        text = text[1:]
    return text
def get_differential_var_str(text):
    for i in range(1, len(text)):
        c = text[i]
        if (not ((c == ' ') or (c == '\r') or (c == '\n') or (c == '\t'))):
            idx = i
            break
    text = text[idx:]
    if (text[0] == '\\'):
        text = text[1:]
    return text