let i = require('fs').readFileSync('/dev/stdin', 'utf8').split('\n').slice(0, -1)
let l = 'oda' === i[0] ? 'yukiko' : 'oda'
let k = 0
for (let c = 1; c < i.length; c++) {
  for (let e of i[c].split('')) {
    if (e !== '.') k++
  }
}
console.log(k % 2 == 0 ? i[0] : l)