//  1280 Cambridge Surprise Royal

10 bells

m = &-30-14-1250-36-1470-58-16-70-18-90
p = +2
b = +4, "- @"
x = +6, "x @"

M = repeat(m, {/*0???/:b, break; p})
W = repeat(m, {/*0/:b, break; p})
H = repeat(m, {/*0?/:b, break; p})
xB = repeat(m, {/10*/:x, break; p})

prove H, M, xB, W, 2H