seven (0x37) lsb: 4.0
seven (0x37) rsb: 12.0
seven (0x37) right x-extrema: 276.0
seven (0x37) x-advance: 288
four (0x34) lsb: 12.0
four (0x34) rsb: 6.0
seven (0x34) right x-extrema: 328.0
Original kerning value: -0.012 em
Original kerned x-advance: 0.276 em
Original x-extrema offset: 0.012 em
Original in-ascender x-extrema offset: 0.012 em
Autokern
seven (0x37) lsb: 4.0
seven (0x37) rsb: 11.0
seven (0x37) right x-extrema: 276.0
seven (0x37) x-advance: 287
four (0x34) lsb: 2.0
four (0x34) rsb: 12.0
seven (0x34) right x-extrema: 318.0
Autokern kerning value: -0.028 em
Autokern kerned x-advance: 0.259 em
Autokern x-extrema overlap: 0.015 em
Autokern in-ascender x-extrema overlap: 0.015 em