function happyLadybugs(b)
    if length(b) == 1 && b[1] !== '_'
        return "NO"
    end
    symbs = Dict()
    for ch in b
        if !haskey(symbs,ch)
            symbs[ch] = 1
        else
            symbs[ch] +=1
        end
    end
    unhappy_num = 0
    for index in eachindex(b)
        if b[index] !== '_'
            if !isHappy(b,index)
                unhappy_num +=1
            end
        end
    end
    if unhappy_num>0 && !haskey(symbs,'_')
        return "NO"
    end
    for (index,value) in symbs
        if index!=='_' && value == 1
            return "NO"
        end
    end
    return "YES"
end

function isHappy(b,index)
    if index == 1 && b[index+1] === b[index]
        return true
    elseif index == length(b) && b[index-1] === b[index]
        return true
    elseif index !== 1 && index !== length(b)
        return b[index-1] === b[index] || b[index+1] === b[index]        
    end
    return false
end

func happyLadybugs(b string) string {
	// Write your code here
	var Array [26]int
	var adj []int
	var space int
	count := 1
	for index, char := range b {
		if char == '_' {
			space++
			continue
		}
		Array[int(char)-65]++
		if index > 0 {
			if rune(b[index-1]) == char {
				count++
			} else {
				adj = append(adj, count)
				count = 1
			}
		}
	}
	adj = append(adj, count)
	if space == 0 {
		for _, a := range adj {
			if a == 1 {
				return "NO"
			}
		}
		return "YES"
	}
	for _, count := range Array {
		if count == 1 {
			return "NO"
		}
	}
	return "YES"
}

def happyLadybugs(b):
    # Write your code here
    if b.count('_')==0:
        i=1
        while i<=len(b)-2 and (b[i]==b[i-1] or b[i]==b[i+1]):
            i+=1
        if i==len(b)-1 and b[i]==b[i-1]:
            return 'YES'
        else: 
            return 'NO'           
    t=Counter(b)
    check=True
    for i in t.keys():
        if i!='_' and t[i]==1:
            check=False
            break
    return 'YES' if check else 'NO'   

function happyLadybugs(b) {
    const ladybugs = b.split("");
    const ladybugsSet = [...new Set(ladybugs)];

    if (!ladybugsSet.includes("_")) {
      for (let i = 0; i < ladybugs.length; i++) {
        if (ladybugs[i - 1] !== ladybugs[i] && ladybugs[i] !== ladybugs[i + 1]) return "NO";
      }
      return "YES";
    } else {
      for (const ladybug of ladybugsSet) {
        if (ladybug !== "_") {
          if (ladybugs.filter((color) => color === ladybug).length === 1) return "NO";
        }
      }
      return "YES";
    }
}