def split_and_join(line):
    full = []
    current = ''
    line_len = len(line)
    for c in range(line_len):
        char = line[c]
        if char == ' ': 
            full.append(current)
            current = ''
        else:
            current = current + char
            
        if c == line_len - 1:
            full.append(str(current))
    
    full_final = ''
    full_len = len(full)
    for v in range(full_len):
        val = full[v]
        full_final += val + ('' if v == full_len-1 else '-')
        
    return full_final

if __name__ == '__main__':
    line = input()
    result = split_and_join(line)
    print(result)