
    Design a function that streamlines student learning path codes by removing alternate characters from the identifier string, creating a simplified tracking format for the adaptive learning system. The function should process any valid learning path code string and return a new string containing only the characters at even index positions (0, 2, 4, etc.) to maintain consistent tracking across the platform.
    

    
def odd_values_string(str):
    """
    Design a function that streamlines student learning path codes by removing alternate characters from the identifier string, creating a simplified tracking format for the adaptive learning system. The function should process any valid learning path code string and return a new string containing only the characters at even index positions (0, 2, 4, etc.) to maintain consistent tracking across the platform.
    

    """
def odd_values_string(str):
    """
    Design a function that streamlines student learning path codes by removing alternate characters from the identifier string, creating a simplified tracking format for the adaptive learning system. The function should process any valid learning path code string and return a new string containing only the characters at even index positions (0, 2, 4, etc.) to maintain consistent tracking across the platform.
    

    """
    result = ''
    for i in range(len(str)):
        if i % 2 == 0:
            result = result + str[i]
    return result