The button codes for that should be
input_b_btn = "12"
input_y_btn = "15"
input_select_btn = "21"
input_start_btn = "22"
input_a_btn = "11"
input_x_btn = "14"
input_l_btn = "17"
input_r_btn = "18"
input_l2_btn = "19"
input_r2_btn = "20"
input_l3_btn = "24"
input_r3_btn = "25"Your file doesnt look like it was generated by EmulationStation? It will generate the correct hotkeys for you.
RetroPie help guides --> https://goo.gl/Yfy8kj
Please read this before asking for help --> http://goo.gl/eLErnl