Name Sort

var array = ["Kristine", "Inocencia", "Ayako", "Olin", "Nguyet", "Esteban", "Tai"]
var prefix = []
var suffix = []

array.forEach(function(value, index) {
    prefix.push(value[0])
    suffix.push(value[value.length - 1].toUpperCase())
})

var pos = 0

prefix.forEach(function(pre, index1) {
    var count = 0
    suffix.forEach(function(suf, index2) {
        if (pre == suf) {
            count++
        }
    })

    if (count == 0) {
        pos = index1
    }
})

var res = []
res.push(array[pos])

while(res.length < prefix.length) {
    prefix.forEach(function(value, index) {
        if (res[res.length - 1][res[res.length - 1].length - 1].toUpperCase() == value && res.length < prefix.length) {
            res.push(array[index])
        }
    })
}

console.log(res)