DE
Object.entries('123123669043'.split('').reduce((acc, cur) => {
acc[cur] = acc[cur] || 0
acc[cur] += 1
return acc
}, {})).find(([, val]) => val === 1)[0]
Size: a a a
DE
Object.entries('123123669043'.split('').reduce((acc, cur) => {
acc[cur] = acc[cur] || 0
acc[cur] += 1
return acc
}, {})).find(([, val]) => val === 1)[0]
DE
Object.entries('123123669043'.split('').reduce((acc, cur) => {
acc[cur] = acc[cur] || 0
acc[cur] += 1
return acc
}, {})).find(([, val]) => val === 1)[0]
ВЛ
DE
DU
L
ВЛ
DU
ВЛ
DU
L
ВЛ
ВЛ
L
const findNum = ns => ns.reduce((s, v) => s^v, 0)
НА
DU
DE
W
DU